Wiring For New Headlights..

[75silverstep]

Put In The New Euro Crystal Clear Headlights This Weekend ,bought The Harness That Goes With It ...need Help Finding Out What To Do About The 3 Prong That Comes Out Of The Fuses.......i Know It Needs To Go To The Fuse Box Or Somewhere ..can Figure Out Most Stuff ........not This .......if Anyone Out There Has Done This Can You Guide Me Threw It ...everything Ispluged In The Headlights & Power To Battery Direct Wires Also..thanks In Advance..

[boxrodz]

75silverstep-
I'm not quite following what saying. Are you looking for the wiring configuration from the fusebox to the headlights or ??? I haven't done this conversion, but I have the wiring schematics for the later 80s trucks and can check it for you, if you like.

[piecesparts]

I am at a loss also. My guess would be that the harness is setup to go to the battery directly for the power to the headlights. The other wires and a relay would included a ground wire (black) and then a connection that would plug into the original headlight harness, so that when you turn on the headlights inside the truck the power from that circuit would actuate the relay and turn on the new lights. The harness is probably wired so that it is simple to connect to the plugs that are already in the truck. My guess is that the 3 prong connector is for a standard headlight plug that is up by the radiator support.

[apstguy]

I have all Euro composite lights and the relay harrness - So you plugged the 4 plugs onto the lights, power and ground right? The last connection should be 5th connector which will plug into one of the old light plugs currently on the truck - this supplies the signal voltage to turn on the relays to turn on the headlights.

[75silverstep]

Originally Posted by apstguy

I have all Euro composite lights and the relay harrness - So you plugged the 4 plugs onto the lights, power and ground right? The last connection should be 5th connector which will plug into one of the old light plugs currently on the truck - this supplies the signal voltage to turn on the relays to turn on the headlights.

I THINK YOU HAVE FOUND THE PROB FOR ME..ONLY HAVE TWO HEADLIGHTS BUT YA THOSE ARE PLUGED IN THE POWER DIRECT WIRES TO BATTERY ARE TO THE BATTERY THE GROUND WIRES ARE WHERE THE OLD GROUND WIRES WERE....NOW YOUR SAYING TO PLUG THE 3 PRONG INTO THE OLD HEADLIGHT BOOT....YA...ILL TRY THAT I KNOW IT DOSNT GO TO THE FIREWALL ITS WAY TO SHORT...ILL TRY THAT CROSSED FINGERS...