Fog Light question

[gdsqdcr]

So, my foglights don't work. The switch on the dash has power, (little light lights up on it), the 20amp fuse under the dash is good, the bulbs are brand new (replaced twice now).

Why o why won't they work?

Yes, I know the stock fogs are useless, but I have bright bulbs ...

 

[SHO Continental]

bad ground... happened to mine too. :cry: but I didn't figure it out until after throwing away perfectly good silverstar 893s

 

[gdsqdcr]

Suggestion on where to start looking for this bad ground? My connections are solid/tight at the fog lights. Where would be the common ground for both lights?
I need an electirical diagram of the lighting, and then someone to explain it to me ...

 

[etc1006]

Get a meter a see if you have power to the main plug from the harness. You can also check the ground the same way, just find which is the ground wire and go from it to the chassis. IIRC the ground for the front lights is at the corners of the rad support on top. I had to get an eraser and some sandpaper and clean the blades of the plug from the harness. Then I scraped inside the sub harness female ends with a small file.

 

[sdpatt]

Here's a long shot:

I had intermittent fog light power losses and then a complete outage. With the wiring diagrams and a DMM (voltmeter), I traced the discontinuity to the coupler above the radiator fan shroud. The pin in that coupler had corroded and overheated from the high resistance (and possibly the higher wattage aftermarket fog light bulbs ). The connector had melted around the suspect pin. A good cleanup of the brass on the pins and a bit of dielectric grease to protect the pins from the elements has kept the lights burning for months with no evidence of heating at the coupler.