Factory Fog Light Install

MattDewalt · February 21, 2003

Anybody ever install factory fog lights in a truck that didn't come with them from the factory? I pulled the cargo lamp switch out. It uses 3 wires. The new switch that has the fog light switch has 5 wires. The harness on the dash has 5 wires. So, I would think that the wiring in the truck is set up to install them. But, I can't find any harnesses or empty plugs under the front bumper to plug them in. Is there a wiring harness I can buy that maybe runs to the fuse panel or something? If all else fails, I'll just end up running my own wiring from the switch via a relay. But, I would really like to make it all stock if possible. Oh, these are for my 99 Silverado in signature.

LarryE · February 21, 2003

You'll have to get the button from the dealership and then have them flash the ecm so that they will work.

points · February 21, 2003

I have a new set of wires and a button. We can work out a price. I bought my truck used and it did not come with fog lights but it had the button and the wire installed already.

Thanks,

pipermaru9 · February 21, 2003

Also, when you go to have the computer updated to "find" the fog lights, make sure you test the remote door lock because mine failed towork after the fog lights were added.

:urgent: :urgent:

MattDewalt · February 21, 2003

I have the button and the lights. I put the button in last night just to verify that the cargo light still works (it does). I just need wiring to attatch the lights to the truck. From what I'm gathering, I can get this wiring, hook up the lights, and then take it to the dealer to update the computer to recognize the lights - correct? Anyone have a part # for the wiring I'll need? I just had my computer updated 3 weeks ago for $35 - oh well!

points · February 21, 2003

Well, I'm more than happy to sell you the wires. Come up with a price and lets go from there.

Thanks

bluelab · February 21, 2003

I had gm foglights installed. I bought the kit from a local GM dealer they came with everything needed to do the install. This included switch, wireing harness & lights with all the hardware required. The only thing needed as pointed out by Larry E was to have the ecm flashed and the dealer had to do it twice because as pipermaru9 pointed out my remote door opener did not work.

alpha42 · February 22, 2003

Go under the front bumper of your truck and look at the plastic covering the wiring.You'll find a plug on each side clipped into a plastic retaining clip.If its wired at the switch its definitely wired down to the lights.Gm installs the same harness.

20024.8stpsde · February 23, 2003

JP Customs sells the whole kit for around $100. It is a factory set up and easy to install. I've done mine.

MattDewalt · February 24, 2003

Well, I looked under the front bumper this weekend. Definately no place to plug a harness into the existing harness. I even looked at an 2000 that has the fog lights to see exactly where the harness plugs in. Maybe 99's used 2 different harnesses depending on the options? Anyway. I think I may just wire them up with a relay like you would a set of aftermarket lights. The only trick is getting them to work with the factory switch.

20024.8stpsde · February 24, 2003

The wires to the factory relay from the BCM are already there. You could get the factory relay, run your own wire to the lights, and have the BCM programmed.