What is the cause of the car headlamp?
(2) The fuse in the line is tripped or burned out. (3) The lamp switch bimetal contact is bad or not closed, or the lamp switch is damaged. (4) ) Lights switch a file connected, and some lights line to take the bite metal sheet contacts open.
fault diagnosis and troubleshooting should first determine the diagnostic range. Can be in accordance with the light line sequence in order to find somewhere open or short circuit. (1) press the horn or toggle signal switch test. If the speaker ring, turn signal lights, then Indicating that the fuse before the power line is good, so you can use the wire test fire or power short connection, the ammeter wiring Note, the ignition switch terminal lights switch posts, etc., in order to check whether the open circuit, such as line connection is good, The switch may have been damaged. (2) try to press the speaker does not ring, the fuse is not tripped, then the fuse before the power line somewhere open or poor wiring.If the fuse trip, indicating that the fuse after the line somewhere. You can remove the speaker, turn the signal power cord, and then press the fuse button test. If you do not trip, turn on the lights switch, the lights are bright, then the ground in the speaker or turn signal line. (3) If the light switch power supply terminal test fire is good, and the light switch when a file is connected, often produce bimetallic contacts open light does not shine (4) at night driving, all the lights suddenly extinguished. In case of this situation should immediately stop, according to the horn test. If the speaker ring, indicating that the power is still good, should still be in order to identify the lights If the horn does not ring, it may be driving in the vibration, the power cord off, due to open circuit can first check the battery terminals are good, and then order to find.
Symptom turns on the switch, all lights are not lit, or the lights switch a block connected, all the lights are not bright
