Headlight and Gauge Lights- Not Working....

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patmckinneyracing

Royal Smart Person
Jan 18, 2009
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San Antonio, TX
Alright I'll simplify this as much as I can. I've spent a couple hours going through the factory service manual I have. It's not a haynes but one of the big green books from the factory.

So far, the gauge lights outside and inside my gauge pod have not been working. I have the positive lead from each gauge wired to the gray wire that controls the gauge lights in the pod and under the dash. For whatever reason, these lights are not working. I've already swapped in a new headlight switch thinking that was the problem. According to the book, the red wire on the headlight switch is direct from the battery (input), then it transfers out of the switch as a dark green wire (output) to the INST LPS fuse, which then transfers out to the gauge lights as the gray wire. One problem is that the switch is getting power from the red wire, but no power is being transferred out in the green wire to the INST LPS fuse.

Another thing I need to find is the wiring schematic is showing that the wire coming from the INST LPS fuse provides power to all the dash lighting. The picture is showing a connection where all 5 wires are connected to the one wire from the fuse box. Does anyone know where this connection may be? I'm tempted to pull out the harness from under the dash and just go through it.

Lastly, my headlights are not working. The hazards and turn signals work just fine, including the side marker lights in the front. But when I turned on the switch, the headlights, tail lights, and side marker lights are not coming on. Any ideas?

I checked the grounds and those are good. I restored the engine/lighing harness under hood. The turn signals working is an indication that there is power being transferred to the front lighting. I've tried three old headlight switches and one new one. Any help is appreciated.
 
When you checked power to the switch did you use a test light or multimeter?
Sounds like you have a bad wire or connector at the switch.
 
when you turn the parking and cluster lites on is both sides of the fuses hot?

and I'd put something in the wires to replace the fusable links...they sure save alot of work if something goes wrong
 
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