Join Date: Jan 2008
Location: Seattle, WA area
Re: Wiring fog lights into my truck
Normally, the fog lamps would be wired with a separate switch tripping the fog relay, and the high-beams forcing the relay off. Wiring for that function would not be difficult, but two relays instead of one if you wanted them on with only the headlight switch instead of a fog light switch, yet still turn off with high-beams. [EDIT - I had a brain-fart. It can be done either way with one relay, but I still need to know if you want them on with the headlight switch only, or anytime you flip a fog light switch.]
If you are really sure you are going to do this, tell me if you are going to use a separate fog lamp switch or not, and I can make you a wiring diagram in the next week or so. And, I checked a 2002 F-150 and the fog lights have only two wires, power and ground. 99% of fogs are that way. A few specialty versions out there have lo/hi beam (driving/fog), and a few have a dim "city light" mode, but I assume you are using standard 2-wire fogs.
-=≡ If it was easy everyone would do it ≡=-
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Last edited by PSIG; 07-25-2013 at 08:34 AM.