North Maine
Merchant Mariner
I had a member as me how I did it on my truck, so I figured I post how and provide a wiring diagram. While I know I left out fuses, but I left that up to the installer, if you want a single fuse from the hot lead to the 2 relays (what I did, forget the number but its pretty easy math) or going to the separate lights. This set-up does NOT put any more current through the stock wiring than the stock wiring, which is why I think this is the best DIY way to do this. you could use a single relay rated to about 60 amps (ford starter relay would be perfect) but I had two 40 amp relays that I got for about a buck a piece, so that what I used. The relays are energized by the high beam wire, and that puts less than one more amp draw on the high beam circuit, so that doesn't worry me... when that happens one relay supplies by aux lights, and the other supplies the low beams. Those wires are in the loom running along the drivers fender well, green is high beam and brown is low beam I THINK, CHECK FIRST... all you have to do is strip a short section and splice in the other wire and electrical tape/ shrink wrap it up.