I have a 2004 F-150, and want to put a set of KC Daylighters on it. Howerver, I can't seem to figure out where the wires run through the firewall, so that I can set the switch up for them inside the cab. If anyone could tell me where to look, I'd sure appreciate it.
Thanks.

 

If you don't mind a little work here is a way to get through where your antenna enters the firewall.

You have to jack up the right front and remove the wheel. Then unscrew the small hex head screws that hold your inside wheel well cover on. There is a place in the engine compartment where a push through wire loom anchor needs to be removed from the wheel well cover. When your sure all attachements are removed, pull the cover back at the rear. It will expose the antenna lead and the gromet where it enters the firewall. The gromet will pop out easily but it has a metal crimp on the inside.

Inside your cab the hole is just in front of the fuse box inside the right kick panel. Its the easiest place I could find to get a few wires into the cab. Be sure and regromet or reseal that hole after your done. Good luck on your project!

 

I appreciate the help on locating a place to run the wires for my lights through the firewall, however, I did not actually use the same grommet that you suggested (I think). I was able to find two that were accessable from the top just above the location you suggested. I had to remove the battery, and battery box to access them, however, this was far easier for me since it's March in Michigan and I have about an inch of ice in my wheel wells, not to mention I was working outside in my driveway and didn't like the idea of jacking my truck up and crawling under there in the snow.
Without your suggestion though, I never would have found the location I used, nor would I have thought of routing the wires inside the cab the way I finally decided on going.
Thanks alot fo rthe help, and I hope at some point I'll be able to return the favor to this forum.

 

I drilled small hole thru rubber by firewall and put all wires into the cabin and when everything is done, i applied some kind of silicone to keep water/air etc out "fill the hole" and it works fine for me.

I did same thing to my Jeep wrangler- no problem.

YOMAN!