western unimount no headlights on truck/plow

[IHI]

I have a western uni mount and the other day I went to hook plow up to go through it, before hooking plow up the truck headlights did not work....marker lights and such do, just no headlights. Hook the plow up and plug plow in....still no headlights on either pick up or plow side...marker lights all work fine, just no headlights at all on truck or plow...hooked or unhooked. WTH???

Was thinking of getting some new relays, even if the old relays are good, new ones would'nt be bad at this age I imagine. But what else could it be?

[snowjoker]

If its a chevy probably the headlight switch..

[sonjaab]

Is it a older relay or iso mod unit?

If its a relay unit and you have tested for power at the plugs
I would try and swapping places with the relays.

[IHI]

It's a 93 F250, I had intentions of printing out the trouble shooting schematics, but I woke up this morning feeling like I got hit by a truck...still managed to fight my way through chemically stripping the blade, but I'm D-U-N dun for the day...ughhhh