Hi all,
Where is the light relay located? I have a 83 truck and my headlights, brake lights and turn signals work great but my tail lights and the marker lights dont work. The dash light isn't working either. I checked the fuses but will probably just change them all anyway .I haven't been able to locate a wiring diagram yet.Any info would be great...Thanks Kyle

 

The headlight and taillight relays are mounted together in a holder up under the dash between the heater and steering colunm.

 

I was able to find both relays. After many hours of work I found a wire in the wiring harness from the relay to the headlight switch had been cut so now everything works great. I have only owned the truck since Monday so trying to work out all the bugs..Thanks for the info...Kyle