A circuit for interconnecting vehicle lamps to realize fault monitoring

Abstract

The present invention discloses a circuit for interconnecting vehicle lamps to realize fault monitoring, which belongs to the field of vehicle-mounted electronic technology. The circuit comprises a rear combination lamp module and a high-mount brake lamp module. The rear combination lamp module is provided with a positive output terminal of a high-mount brake power supply and a control terminal. The positive output terminal of the high-mount brake power supply is connected to the positive electrode of the high-mount brake lamp, and the control terminal is connected to the negative electrode of the high-mount brake lamp through a control line. The rear combination lamp module determines whether a fault occurs in the high-mount brake lamp module by detecting a loop current of the high-mount brake lamp module. The rear combination lamp module is controlled by an external PWM signal, which solves the technical problem of realizing fault monitoring and control of lights through lamp interconnection. The circuit architecture is simple, the logical relationship is clear, the required components are common, the fault monitoring and control capabilities can be met, the logic processing of the BCM is simplified, the length of the wiring harness between the entire lamp and the BCM can be shortened to reduce costs, and for the high-mount brake lamp, a flashing function in emergency braking conditions can also be realized.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle-mounted electronics and relates to a circuit for interconnecting vehicle lamps to realize fault monitoring. Background Art

[0002] Behind the current good economic development, the automotive industry plays an indispensable role in revitalizing the economy. Its obvious advantage in promoting the rapid development of related industries has become an important tool for revitalizing the economy. For the automotive field, low cost / multi-function will inevitably become the mainstream trend.

[0003] Currently, the connection harness between the rear lamp and the BCM is very long, resulting in a lot of material waste and increased production costs. Summary of the Invention

[0004] The present invention is to solve the above technical problems. The purpose of the present invention is to provide a circuit for interconnecting vehicle lamps to realize fault monitoring, which solves the technical problem of realizing fault monitoring and control of lights through lamp interconnection.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A circuit for interconnecting vehicle lamps to achieve fault monitoring includes a rear combination lamp module and a high-mounted brake lamp module. The rear combination lamp module is provided with a high-mounted brake power supply positive electrode output terminal and a control terminal. The high-mounted brake power supply positive electrode output terminal is connected to the positive electrode of the high-mounted brake lamp, and the control terminal is connected to the negative electrode of the high-mounted brake lamp via a control line.

[0007] The rear combination lamp module determines whether the high-mounted brake lamp module has a fault by detecting the circuit current of the high-mounted brake lamp module;

[0008] The rear combination lamp module is controlled by an external PWM signal.

[0009] Preferably, the rear combination lamp module includes a resistor Rs3, a resistor Rs4, a capacitor RC43, a transistor RQ3, a resistor R24, a resistor R23, a capacitor RC45, a transistor Q4, a resistor Rs1, a resistor Rs2, a resistor Rs8, a resistor Rs7, a comparator U5, a resistor Rs6 and a resistor Rs5. The base of the transistor RQ3 is connected to the external PWM signal through the resistor Rs3, the emitter is connected to the first ground line, and the collector is connected to the G pole of the field effect transistor Q4 through the resistor R24. One end of the resistor Rs4 is connected to the base of the transistor RQ3 and the other end is connected to the first ground line. The capacitor RC43 is connected in parallel with the resistor Rs4, and one end of the resistor R23 is connected to the The capacitor RC45 is connected to the S pole of the field effect transistor Q4 and the other end is connected to the G pole of the field effect transistor Q4. The capacitor RC45 is connected in parallel with the resistor R23. The S pole of the field effect transistor Q4 is the control end. The D pole of the field effect transistor Q4 is connected to the 3 pin of the comparator U5 through the resistor Rs8. One end of the resistor Rs1 is connected to the D pole of the field effect transistor Q4 and the other end is connected to the first ground line. The resistor Rs2 is connected in parallel with the resistor Rs1. The 1 pin of the comparator U5 is connected to the 5V power supply through the resistor Rs7. The 1 pin of the comparator U5 is the external output end of the detection result. The 2 pin of the comparator U5 is connected to the reference voltage Vin through the resistor Rs5. The 2 pin of the comparator U5 is also connected to the first ground line through the resistor Rs5.

[0010] Preferably, the external output end of the detection result is connected to an IO port of an external MCU, the external PWM signal is provided by another IO port of the external MCU, and the reference voltage Vin is provided by the external MCU.

[0011] Preferably, the high-mounted brake light module includes an interface P1, a capacitor SC1, a capacitor SC2, a resistor SR1, a diode SD1, a first LED light group, a second LED light group, a third LED light group, a fourth LED light group, a fifth LED light group, a sixth LED light group, and a seventh LED light group;

[0012] Pin 2 of the interface P1 is connected to the second ground wire, pin 1 is connected to the CHSML power supply, and the control end is connected to pin 2 of the interface P1;

[0013] Pin 1 of interface P1 is connected to the anode of diode SD1, and the cathode of diode SD1 is connected to the first LED light group, the second LED light group, the third LED light group, the fourth LED light group, the fifth LED light group, the sixth LED light group, and the seventh LED light group respectively;

[0014] The capacitor SC1, the capacitor SC2 and the resistor SR1 are connected in parallel, one end of which is connected to pin 1 of the interface P1, and the other end is connected to the second ground line;

[0015] The first LED lamp group includes an LED lamp SL1, an LED lamp SL2, an LED lamp SL3, a resistor SR2, a resistor SR3, and a resistor SR4. The positive electrodes of the LED lamps SL1, SL2, and SL3 connected in series are connected to the negative electrode of the diode SD1 through the resistor RS2, and the negative electrode is connected to the second ground line. The resistors SR3 and SR4 are both connected in parallel with the resistor SR2.

[0016] The second LED lamp group includes an LED lamp SL4, an LED lamp SL5, an LED lamp SL6, a resistor SR5, a resistor SR6, and a resistor SR7. The positive electrodes of the LED lamps SL4, SL5, and SL6 connected in series are connected to the negative electrode of the diode SD1 through the resistor RS5, and the negative electrode is connected to the second ground line. The resistors SR6 and SR7 are both connected in parallel with the resistor SR5.

[0017] The third LED lamp group includes LED lamp SL7, LED lamp SL8, LED lamp SL9, resistors SR8, SR9 and SR10. The positive electrodes of LED lamp SL7, LED lamp SL8 and LED lamp SL9 connected in series are connected to the negative electrode of diode SD1 through resistor RS8, and the negative electrode is connected to the second ground line. Resistors SR9 and SR10 are both connected in parallel with resistor SR8.

[0018] The fourth LED lamp group includes an LED lamp SL10, an LED lamp SL11, an LED lamp SL12, a resistor SR11, a resistor SR12, and a resistor SR13. The positive electrodes of the LED lamps SL10, SL11, and SL12 connected in series are connected to the negative electrode of the diode SD1 through the resistor RS11, and the negative electrode is connected to the second ground line. The resistors SR12 and SR13 are both connected in parallel with the resistor SR11.

[0019] The fifth LED lamp group includes an LED lamp SL13, an LED lamp SL14, an LED lamp SL15, a resistor SR14, a resistor SR15, and a resistor SR16. The positive electrodes of the LED lamps SL13, SL14, and SL15 connected in series are connected to the negative electrode of the diode SD1 through the resistor RS14, and the negative electrode is connected to the second ground line. The resistors SR15 and SR16 are both connected in parallel with the resistor SR14.

[0020] The sixth LED lamp group includes LED lamp SL16, LED lamp SL17, LED lamp SL18, resistor SR17, resistor SR18 and resistor SR19. The positive electrodes of LED lamp SL16, LED lamp SL17 and LED lamp SL18 connected in series are connected to the negative electrode of diode SD1 through resistor RS17, and the negative electrodes are connected to the second ground line. Resistors SR18 and SR19 are both connected in parallel with resistor SR17.

[0021] The seventh LED lamp group includes LED lamp SL19, LED lamp SL20, LED lamp SL21, resistor SR20, resistor SR21 and resistor SR22. The positive poles of LED lamp SL19, LED lamp SL20 and LED lamp SL21 connected in series are connected to the negative pole of diode SD1 through resistor RS20, and the negative pole is connected to the second ground wire. Resistors SR21 and SR22 are both connected in parallel with resistor SR20.

[0022] Preferably, the CHSML power supply is provided by an external power supply.

[0023] Preferably, the rear combination lamp module performs N-1 or N-3 fault monitoring on the high-mounted brake lamp module.

[0024] Preferably, the N-1 or N-3 fault monitoring is whether one LED is turned off or three LEDs are turned off in the fault state.

[0025] Preferably, the rear combination lamp module determines whether the high-mounted brake lamp module is faulty by monitoring the loop current of the high-mounted brake lamp module.

[0026] Preferably, after the user performs emergency braking, the rear combination lamp module receives the emergency braking message and controls the high-mounted brake lamp to exhibit an emergency flashing function.

[0027] Beneficial effects of the present invention:

[0028] The circuit for interconnecting vehicle lamps to achieve fault monitoring described in the present invention solves the technical problem of achieving fault monitoring and control of lights through lamp interconnection. The circuit architecture of the present invention is simple, the logical relationship is clear, the components required for the circuit are common, and the fault monitoring and control capabilities can be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a block diagram of the principle diagram of the present invention;

[0030] Figure 2 is a circuit diagram of a rear combination lamp module of the present invention;

[0031] Figure 3 It is a circuit diagram of the high-mounted brake lamp module of the right headlight of the present invention. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] like Figure 1-Figure 3 A circuit for interconnecting vehicle lamps to achieve fault monitoring is shown, including a rear combination lamp module and a high-mounted brake lamp module. The rear combination lamp module is provided with a high-mounted brake power supply positive electrode output terminal and a control terminal. The high-mounted brake power supply positive electrode output terminal is connected to the positive electrode of the high-mounted brake lamp, and the control terminal is connected to the negative electrode of the high-mounted brake lamp via a control line.

[0034] The rear combination lamp module determines whether the high-mounted brake lamp module has a fault by detecting the circuit current of the high-mounted brake lamp module;

[0035] The rear combination lamp module is controlled by an external PWM signal.

[0036] The present invention is mostly used for vehicle rear lamps, with rear combination lamps as the main ones and high-mount brake lamps or fog / reversing lamps as the auxiliary ones. By using an interconnected method, the main lamps (rear combination lamps) are used to control the operation of the auxiliary lamps (high-mount or fog / reversing lamps), or the high-mount lamps can flash urgently. Fault monitoring can be achieved by collecting the auxiliary lamp circuit current. Based on functional safety considerations, a hard-wired signal lighting function can also be achieved after communication failure.

[0037] The vehicle lamp in the present invention is a rear lamp of the vehicle, and satisfies the requirement of hard-line lighting when communication fails.

[0038] The present invention also realizes flashing control of the high-mounted brake light under emergency braking by interconnecting the lamps.

[0039] Preferably, the rear combination lamp module includes a resistor Rs3, a resistor Rs4, a capacitor RC43, a transistor RQ3, a resistor R24, a resistor R23, a capacitor RC45, a transistor Q4, a resistor Rs1, a resistor Rs2, a resistor Rs8, a resistor Rs7, a comparator U5, a resistor Rs6 and a resistor Rs5. The base of the transistor RQ3 is connected to the external PWM signal through the resistor Rs3, the emitter is connected to the first ground line, and the collector is connected to the G pole of the field effect transistor Q4 through the resistor R24. One end of the resistor Rs4 is connected to the base of the transistor RQ3 and the other end is connected to the first ground line. The capacitor RC43 is connected in parallel with the resistor Rs4, and one end of the resistor R23 is connected to the The capacitor RC45 is connected to the S pole of the field effect transistor Q4 and the other end is connected to the G pole of the field effect transistor Q4. The capacitor RC45 is connected in parallel with the resistor R23. The S pole of the field effect transistor Q4 is the control end. The D pole of the field effect transistor Q4 is connected to the 3 pin of the comparator U5 through the resistor Rs8. One end of the resistor Rs1 is connected to the D pole of the field effect transistor Q4 and the other end is connected to the first ground line. The resistor Rs2 is connected in parallel with the resistor Rs1. The 1 pin of the comparator U5 is connected to the 5V power supply through the resistor Rs7. The 1 pin of the comparator U5 is the external output end of the detection result. The 2 pin of the comparator U5 is connected to the reference voltage Vin through the resistor Rs5. The 2 pin of the comparator U5 is also connected to the first ground line through the resistor Rs5.

[0040] The present invention realizes fault monitoring by detecting the loop current value. A current threshold is set for the main light and the auxiliary light current value is collected. When the current value is lower than the threshold, the auxiliary light is defaulted to a fault state and the fault is reported to the BCM (body control module):

[0041] like Figure 2 In the circuit, the CHSML network node is connected to the negative pole of the auxiliary light, and the PWM input of the Rs3 resistor is connected to the GPIO port of the MCU. It outputs a high level during normal braking and outputs a PWM signal during emergency braking.

[0042] The PWM signal controls the auxiliary light to flash.

[0043] When the output is high, transistors RQ3 and Q4 are turned on, thereby controlling the auxiliary lamp's negative pole to be grounded to form a loop to light the auxiliary lamp. The two resistors Rs1 and Rs2 form a ground potential for collecting the loop current. This potential is input to the non-inverting input of the comparator U5, and the inverting input is connected to resistors Rs6 and Rs5 to set a reference voltage. This reference voltage is a threshold voltage that does not meet the optical requirements. The loop current of the auxiliary lamp is detected by detecting the current of the D pole of Q4. When the non-inverting voltage is higher than the inverting voltage, the OUT pin outputs a high level to the external MCU, otherwise it outputs a low level. The external MCU knows whether the auxiliary lamp has a fault by monitoring the level change of this pin. It should be noted that the several resistors used should be high-precision resistors as much as possible to reduce the threshold error.

[0044] In this embodiment, all wiring harnesses of the high-mounted lamp as an auxiliary lamp are connected to the main lamp (rear combination lamp), including power supply. It should be noted that the positive pole of the auxiliary lamp must be powered from the pulse-proof and filtered port of the positive pole of the main lamp. This can ensure that the auxiliary lamp is not damaged by pulses, and the input is clean and free of noise. The negative pole of the auxiliary lamp also needs to be connected to the main lamp. The control principle is that the main lamp uses the logic circuit of the switching tube to control the grounding of the negative pole of the auxiliary lamp to form a loop to light the auxiliary lamp.

[0045] Preferably, the external output end of the detection result is connected to an IO port of an external MCU, the external PWM signal is provided by another IO port of the external MCU, and the reference voltage Vin is provided by the external MCU.

[0046] Preferably, the high-mounted brake light module includes an interface P1, a capacitor SC1, a capacitor SC2, a resistor SR1, a diode SD1, a first LED light group, a second LED light group, a third LED light group, a fourth LED light group, a fifth LED light group, a sixth LED light group, and a seventh LED light group;

[0047] Pin 2 of the interface P1 is connected to the second ground wire, pin 1 is connected to the CHSML power supply, and the control end is connected to pin 2 of the interface P1;

[0048] Pin 1 of interface P1 is connected to the anode of diode SD1, and the cathode of diode SD1 is connected to the first LED light group, the second LED light group, the third LED light group, the fourth LED light group, the fifth LED light group, the sixth LED light group, and the seventh LED light group respectively;

[0049] The capacitor SC1, the capacitor SC2 and the resistor SR1 are connected in parallel, one end of which is connected to pin 1 of the interface P1, and the other end is connected to the second ground line;

[0050] The first LED lamp group includes an LED lamp SL1, an LED lamp SL2, an LED lamp SL3, a resistor SR2, a resistor SR3, and a resistor SR4. The positive electrodes of the LED lamps SL1, SL2, and SL3 connected in series are connected to the negative electrode of the diode SD1 through the resistor RS2, and the negative electrode is connected to the second ground line. The resistors SR3 and SR4 are both connected in parallel with the resistor SR2.

[0051] The second LED lamp group includes an LED lamp SL4, an LED lamp SL5, an LED lamp SL6, a resistor SR5, a resistor SR6, and a resistor SR7. The positive electrodes of the LED lamps SL4, SL5, and SL6 connected in series are connected to the negative electrode of the diode SD1 through the resistor RS5, and the negative electrode is connected to the second ground line. The resistors SR6 and SR7 are both connected in parallel with the resistor SR5.

[0052] The third LED lamp group includes LED lamp SL7, LED lamp SL8, LED lamp SL9, resistors SR8, SR9 and SR10. The positive electrodes of LED lamp SL7, LED lamp SL8 and LED lamp SL9 connected in series are connected to the negative electrode of diode SD1 through resistor RS8, and the negative electrode is connected to the second ground line. Resistors SR9 and SR10 are both connected in parallel with resistor SR8.

[0053] The fourth LED lamp group includes an LED lamp SL10, an LED lamp SL11, an LED lamp SL12, a resistor SR11, a resistor SR12, and a resistor SR13. The positive electrodes of the LED lamps SL10, SL11, and SL12 connected in series are connected to the negative electrode of the diode SD1 through the resistor RS11, and the negative electrode is connected to the second ground line. The resistors SR12 and SR13 are both connected in parallel with the resistor SR11.

[0054] The fifth LED lamp group includes an LED lamp SL13, an LED lamp SL14, an LED lamp SL15, a resistor SR14, a resistor SR15, and a resistor SR16. The positive electrodes of the LED lamps SL13, SL14, and SL15 connected in series are connected to the negative electrode of the diode SD1 through the resistor RS14, and the negative electrode is connected to the second ground line. The resistors SR15 and SR16 are both connected in parallel with the resistor SR14.

[0055] The sixth LED lamp group includes LED lamp SL16, LED lamp SL17, LED lamp SL18, resistor SR17, resistor SR18 and resistor SR19. The positive electrodes of LED lamp SL16, LED lamp SL17 and LED lamp SL18 connected in series are connected to the negative electrode of diode SD1 through resistor RS17, and the negative electrodes are connected to the second ground line. Resistors SR18 and SR19 are both connected in parallel with resistor SR17.

[0056] The seventh LED lamp group includes LED lamp SL19, LED lamp SL20, LED lamp SL21, resistor SR20, resistor SR21 and resistor SR22. The positive poles of LED lamp SL19, LED lamp SL20 and LED lamp SL21 connected in series are connected to the negative pole of diode SD1 through resistor RS20, and the negative pole is connected to the second ground wire. Resistors SR21 and SR22 are both connected in parallel with resistor SR20.

[0057] like Figure 3 As shown in the figure, it is the auxiliary light circuit diagram, which adopts a resistive solution and connects three LEDs in series in parallel. The purpose is to reduce the loop current when N-3 occurs. When the number of reduced LEDs fails to meet the light distribution, the main light will detect that the auxiliary light loop current is less than the set threshold, and it will be considered a fault, and then report the fault to the BCM.

[0058] Preferably, the CHSML power supply is provided by an external power supply.

[0059] Preferably, the rear combination lamp module performs N-1 or N-3 fault monitoring on the high-mounted brake lamp module.

[0060] Preferably, the N-1 or N-3 fault monitoring is whether one LED is turned off or three LEDs are turned off in the fault state.

[0061] Preferably, the rear combination lamp module determines whether the high-mounted brake lamp module is faulty by monitoring the loop current of the high-mounted brake lamp module.

[0062] Preferably, after the user performs emergency braking, the rear combination lamp module receives the emergency braking message and controls the high-mounted brake lamp to exhibit an emergency flashing function.

[0063] The circuit for interconnecting vehicle lamps to achieve fault monitoring described in the present invention solves the technical problem of achieving fault monitoring and control of lights through lamp interconnection. The circuit architecture of the present invention is simple, the logical relationship is clear, the components required for the circuit are common, and the fault monitoring and control capabilities can be met.

[0064] The rear lamps of the present invention can uniformly report faults in the form of messages, which not only simplifies the logical processing of the BCM, but also shortens the length of the wiring harness between the entire lamp and the BCM to reduce costs. For the high-mounted brake lights, it can also realize the flashing function in emergency braking situations. This connection method is very suitable for vehicle lamps in terms of function, logic and cost.

[0065] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0066] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing module, or each unit may exist physically separately, or two or more units may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or in the form of software functional modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may also be stored in a computer-readable storage medium.

[0067] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A circuit for interconnecting vehicle lamps to implement fault monitoring, characterized by: It includes a rear combination lamp module and a high-mounted brake lamp module. The rear combination lamp module is provided with a high-mounted brake power supply positive electrode output terminal and a control terminal. The high-mounted brake power supply positive electrode output terminal is connected to the positive electrode of the high-mounted brake lamp, and the control terminal is connected to the negative electrode of the high-mounted brake lamp through a control line. The rear combination lamp module determines whether the high-mounted brake lamp module has a fault by detecting the circuit current of the high-mounted brake lamp module; The rear combination lamp module is controlled by an external PWM signal; The rear combination lamp module includes a resistor Rs3, a resistor Rs4, a capacitor RC43, a transistor RQ3, a resistor R24, a resistor R23, a capacitor RC45, a transistor Q4, a resistor Rs1, a resistor Rs2, a resistor Rs8, a resistor Rs7, a comparator U5, a resistor Rs6 and a resistor Rs5. The base of the transistor RQ3 is connected to the external PWM signal through the resistor Rs3, the emitter is connected to the first ground line, and the collector is connected to the G electrode of the field effect transistor Q4 through the resistor R24. One end of the resistor Rs4 is connected to the base of the transistor RQ3 and the other end is connected to the first ground line. The capacitor RC43 is connected in parallel with the resistor Rs4. One end of the resistor R23 is connected to the field effect transistor Q4. The S pole of the field effect tube Q4 and the other end are connected to the G pole of the field effect tube Q4, the capacitor RC45 is connected in parallel with the resistor R23, the S pole of the field effect tube Q4 is the control end, the D pole of the field effect tube Q4 is connected to the 3 pin of the comparator U5 through the resistor Rs8, one end of the resistor Rs1 is connected to the D pole of the field effect tube Q4, and the other end is connected to the first ground line, the resistor Rs2 is connected in parallel with the resistor Rs1, the 1 pin of the comparator U5 is connected to the 5V power supply through the resistor Rs7, the 1 pin of the comparator U5 is the external output end of the detection result, the 2 pin of the comparator U5 is connected to the reference voltage Vin through the resistor Rs5, and the 2 pin of the comparator U5 is also connected to the first ground line through the resistor Rs5.

2. The circuit for interconnecting vehicle lamps to implement fault monitoring according to claim 1, characterized in that: The external output end of the detection result is connected to an IO port of the external MCU, the external PWM signal is provided by another IO port of the external MCU, and the reference voltage Vin is provided by the external MCU.

3. The circuit for interconnecting vehicle lamps to implement fault monitoring according to claim 1, characterized in that: The high-mounted brake light module includes an interface P1, a capacitor SC1, a capacitor SC2, a resistor SR1, a diode SD1, a first LED light group, a second LED light group, a third LED light group, a fourth LED light group, a fifth LED light group, a sixth LED light group, and a seventh LED light group; Pin 2 of the interface P1 is connected to the second ground wire, pin 1 is connected to the CHSML power supply, and the control end is connected to pin 2 of the interface P1; Pin 1 of interface P1 is connected to the anode of diode SD1, and the cathode of diode SD1 is connected to the first LED light group, the second LED light group, the third LED light group, the fourth LED light group, the fifth LED light group, the sixth LED light group, and the seventh LED light group respectively; The capacitor SC1, the capacitor SC2 and the resistor SR1 are connected in parallel, one end of which is connected to pin 1 of the interface P1, and the other end is connected to the second ground line; The first LED lamp group includes an LED lamp SL1, an LED lamp SL2, an LED lamp SL3, a resistor SR2, a resistor SR3, and a resistor SR4. The positive electrodes of the LED lamps SL1, SL2, and SL3 connected in series are connected to the negative electrode of the diode SD1 through the resistor RS2, and the negative electrode is connected to the second ground line. The resistors SR3 and SR4 are both connected in parallel with the resistor SR2. The second LED lamp group includes an LED lamp SL4, an LED lamp SL5, an LED lamp SL6, a resistor SR5, a resistor SR6, and a resistor SR7. The positive electrodes of the LED lamps SL4, SL5, and SL6 connected in series are connected to the negative electrode of the diode SD1 through the resistor RS5, and the negative electrode is connected to the second ground line. The resistors SR6 and SR7 are both connected in parallel with the resistor SR5. The third LED lamp group includes LED lamp SL7, LED lamp SL8, LED lamp SL9, resistors SR8, SR9 and SR10. The positive electrodes of LED lamp SL7, LED lamp SL8 and LED lamp SL9 connected in series are connected to the negative electrode of diode SD1 through resistor RS8, and the negative electrode is connected to the second ground line. Resistors SR9 and SR10 are both connected in parallel with resistor SR8. The fourth LED lamp group includes an LED lamp SL10, an LED lamp SL11, an LED lamp SL12, a resistor SR11, a resistor SR12, and a resistor SR13. The positive electrodes of the LED lamps SL10, SL11, and SL12 connected in series are connected to the negative electrode of the diode SD1 through the resistor RS11, and the negative electrode is connected to the second ground line. The resistors SR12 and SR13 are both connected in parallel with the resistor SR11. The fifth LED lamp group includes an LED lamp SL13, an LED lamp SL14, an LED lamp SL15, a resistor SR14, a resistor SR15, and a resistor SR16. The positive electrodes of the LED lamps SL13, SL14, and SL15 connected in series are connected to the negative electrode of the diode SD1 through the resistor RS14, and the negative electrode is connected to the second ground line. The resistors SR15 and SR16 are both connected in parallel with the resistor SR14. The sixth LED lamp group includes LED lamp SL16, LED lamp SL17, LED lamp SL18, resistor SR17, resistor SR18 and resistor SR19. The positive electrodes of LED lamp SL16, LED lamp SL17 and LED lamp SL18 connected in series are connected to the negative electrode of diode SD1 through resistor RS17, and the negative electrodes are connected to the second ground line. Resistors SR18 and SR19 are both connected in parallel with resistor SR17. The seventh LED lamp group includes LED lamp SL19, LED lamp SL20, LED lamp SL21, resistor SR20, resistor SR21 and resistor SR22. The positive poles of LED lamp SL19, LED lamp SL20 and LED lamp SL21 connected in series are connected to the negative pole of diode SD1 through resistor RS20, and the negative pole is connected to the second ground wire. Resistors SR21 and SR22 are both connected in parallel with resistor SR20.

4. The circuit for interconnecting vehicle lamps to implement fault monitoring according to claim 3, characterized in that: The CHSML power supply is provided by an external power supply.

5. The circuit for interconnecting vehicle lamps to implement fault monitoring according to claim 3, characterized in that: The rear combination lamp module performs N-1 or N-3 fault monitoring on the high-mounted brake lamp module.

6. The circuit for interconnecting vehicle lamps to implement fault monitoring according to claim 5, characterized in that: The N-1 or N-3 fault monitoring refers to whether one LED is turned off or three LEDs are turned off in the fault state.

7. The circuit for interconnecting vehicle lamps to implement fault monitoring according to claim 5, characterized in that: The rear combination lamp module determines whether the high-mounted brake lamp module is faulty by monitoring the loop current of the high-mounted brake lamp module.

8. The circuit for interconnecting vehicle lamps to implement fault monitoring according to claim 5, characterized in that: After the user performs emergency braking, the rear combination lamp module receives the emergency braking message and controls the high-mounted brake lights to perform emergency flashing function.

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