PDA

View Full Version : Trailer wiring harness diag?


chad1966
04-03-2014, 04:11 PM
I picked up a OE volvo trailer hitch and the wiring harness that came with it has me a bit confused. Ok so I understand that 240's have separate turn and tail light signals. The harness has this additional box that was hooked inline that I am assume was for the tail lights for the trailer but I am having a hard time wrapping my mind around how it works. The 2 solid green wires that are attached on the small box labeled H617 were attached seperatly inline with the green and yellow wires going to the trailer.The black and yellow were cut and I dont know where they were attached. What does the small box labeled H617 do? How do I get running lights with this setup. Thanks.

anders
04-04-2014, 06:45 AM
I would just run the tail light converter, I'm not sure what the other box is for. Running lights are hooked up directly from the volvo tail light harness to the trailer plug.

745 TurboGreasel
04-04-2014, 12:46 PM
It might be a relay to run the marker lights off a different power source, it can be too big a load for the headlight switch connector sometimes.