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How to analysis fault diagnosis of automobile lamps?

Contents:Industry ReportStars:3 StarsPopularity:-Time:2010-08-02 00:26:00

Large Medium SmallReffer:DingjucarlightEditor:SALES HUAuthor:SALES HU

Signal light,dashboard light:
1: Tail lights do not light,taillight relay no sound
Phenomenon:
The tail lamp switch opens, the rear light does not shine.
Reason:
  F8 Insurance break;
  relay failure;
  wire circuit;
  bad plug connectors;
  taillight switch failure.
 Diagnosis:
the fuse box under the third row of the third row of the single control socket green line bond strap, no relay noise, disconnect the taillight relay, with a test light test the power socket, no power off the insurance for the F8, and electricity damage the relay. Relays are sound, indicating switch is faulty.
  The combination switch socket on the left side of the green line bond strap, no sound green line relay circuit, a noise failure for the light switch is damaged.
 
2 Taillight relay with sound, light is off
Phenomenon:
    Open the rear light switch, taillight relays are sound, all the tail lights are not bright bulb on the circuit.
    Reason:
     
relay crooked claws;
     
printed circuit board circuit;
     
socket off;
     
all the bulbs burn out.
    Diagnosis:
     
Check taillight relay socket, normally to two holes with electricity, if a hole has electricity, the other holes without electricity, the printed circuit board circuit.
     
Check whether the crooked claw relay will switch.
     
check the fuse box under the third row of the fourth row of the first outlet jack red / yellow cord or plug off bad, with a test light to test the hole red / yellow line, no electrical circuit for the printed circuit, an electric Note that all the bad bulb, or the section of wire circuit.
 
3 after the tail lights, license lights, right front small light does not shine
Phenomenon:
    Open the rear light switch, taillight relays are sound, all the tail lights are not bright bulb on the circuit.
    Reason:
     
relay crooked claws;
     
printed circuit board circuit;
     
socket off;
     
all the bulbs burn out.
    Diagnosis:
     
Check taillight relay socket, normally to two holes with electricity, if a hole has electricity, the other holes without electricity, the printed circuit board circuit.
     
Check whether the crooked claw relay will switch.
     
check the fuse box under the third row of the fourth row of the first outlet jack red / yellow cord or plug off bad, with a test light to test the hole red / yellow line, no electrical circuit for the printed circuit, an electric Note that all the bad bulb, or the section of wire circuit.

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