How to solve the problem of car lighting failure?

Turn signal failure

Cause of failure:

Safety fuse

Controller output loop

The light bulb damage

Tools used for maintenance:

multimeter

Process of fault inspection:

1. Check whether the fuse of electrical junction box F35 is blown;

2. Check whether pins 1 and 2 of the combined switch X102/1 are 24V voltage;

3. Check whether 24V power supply is output when Pin 1 and Pin 4 turn on the turn signal of the second plug of Nano controller;

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Two, tail light does not light fault

Cause of failure:

Taillight joint is loose

Bad contact with junction box

Safety fuse

Maintenance tools:

multimeter

Process of fault inspection:

1. Check whether the wiring harness plug of the failed lamp is loose and corroded;

2. Check whether the insert block number in the distribution box corresponds to the distribution box;

3. Check whether the safety of distribution box F19 and F21 is fused;