The RIGHT way to upgrade your 97-01 Headlight Harness w/Fog Lights
 

After searching for a couple hours for the correct way to install a headlight harness and still keep the factory correct fog light function, I had to figure it out on my own. I just found too many "I pulled the fuses" responses.

It's really easy. Pull your driver side headlight. There are 2 red wires. Cut the red wires like this:

Attachment 330585

Hook up a multimeter to determine what wire is the hi beam headlights. Turn on your headlights + highbeams. Only one red wire will have about 11volts. When you find that wire, tape it off and put if away - you wont use it. You want the OTHER red wire. This is the red wire that goes to the fog light relay.

Take that red wire and tap it right into your new highbeam wire on the new harness like this:
Attachment 330586

Obviously you want to tape off or heat shrink the connections. And that's it! Now you can have a better headlight harness and still keep your fog lights that will function as the factory intended.