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Lights Don't Work

Without doing a "hands on" troubleshooting of your vehicle, no one can tell you what specific defect is causing your problem. Therefore this answer will of necessity be generic in nature.

Usually this type of problem is caused by what is called an "open circuit" condition.

Open circuits can be caused by several things, a few of which I can recall now:

  • A disconnected, or loose, connector [or splice] anywhere in the circuit.
  • Corrosion, or road film buildup, on the contacts inside of a connector.
  • Corrosion in the metal "socket" the lamp [light bulb] is inserted into [since all lights and thus at least 3 circuits are involved this is not likely in this case].
  • A cut or broken wire in the circuit including the ground wire between the lamp socket and the grounded car body sheet metal [again, less likely unless it happened to be the single wire between the fuse and the main switch. This should be checked].
  • IF complete and proper troubleshooting of the dysfunctional circuit does not reveal any of the above as causal, then it is possible that the switch [or relay if so equipped] is defective. As main lighting switches are very expensive, and difficult to change out, I suggest that switch replacement should be the last resort.

It is very frustrating to replace an expensive and difficult to install component only to find out later that the problem was caused by something else, and there was nothing wrong with the replaced component. So, do a thorough investigation of all the connectors, connections, splices [if any], and all ---components of the nonfunctional light circuits BEFORE replacing anything.

I would first check to confirm that electrical power is getting TO the main light switch, and then is coming OUT OF it. IF power is present at both points, then fully inspect and check all of the wiring harnesses and connections [plugs, splices, etc.] for the affected circuits.

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15y ago

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