I recently installed aftermarket Fog Lights on a 2000 Toyota 4Runner (Third Generation). I was able to use some of the factory wiring that was already ran for optional Factory Fog lights.
Under the hood on the driver side, you should be able to locate the fuse/relay panel. The fog lights fuse/relay location are normally clearly marked on the top plastic cover.
The fog light circuit is typically fused at 15 amps. If the vehicle didn't come equipped with the factory fog lights, there will most likely be no relay in the location. If you look at the relay location you will notice five female spade connectors. The two larger spade connectors on the right side are the ones I used (A and B. One should meter constant 12V, the other should meter continuity to the pink wires on the factory Fog Light Harnesses.
The factory fog light harnesses should be taped up behind the bumper. On each side, they are pretty easy to find.
On the factory fog light harnesses you should have two wires
White/Black - Ground
Pink - Goes up to fuse/relay panel in engine bay (Positive)
If you connect your aftermarket fog lights, to the wires at the factory fog light harnesses. White/Black wires should connect to ground wires coming off the aftermarket lights, Pink wires should be connected to the positive wires coming off the aftermarket lights. Now when you jump terminals A and B at the factory fog light relay location, you should be able to power up your new fog lights. The fog lights I installed required about 8 amps of current with the vehicle off.
Now all I did was run two wires one from terminal A and one from terminal B, though the fire wall into the vehicle and connected them to an on/off switch.
You will always want to make sure to use a switch that is appropriately rated for this application. If I remember correctly I used a switch rated to handle 25 amps @12 Volts.
Hope this helps!
Jeremy's Car Audio Tips
This post first appeared on Car Audio Tips Tricks And How To's, please read the originial post: here
