No Trailer Running Lights, Brown Wire Causing Short on a 2007 Suzuki Forenza

Question:

2007 Suzuki Forenza 4 door car. Hooked up trailer lights but have no Running lights even though all turn signals an breaks work. Checked out grounds they are good. If I plug in brown wire it causes short.

asked by: Marti O

Expert Reply:

The brown wire on wiring harness # 119178KIT or # C56175 for your 2007 Suzuki Forenza is for the running lights so if it is not connected then that would be why the running lights are not working on the trailer.

So the question now is why does connecting the brown wire cause a short? There could be more than one wire that carries a running light circuit. Make sure to test the wires with the included circuit tester to figure out which wire(s) carry the running light circuit on your vehicle.

You mentioned the grounds are good. When installing the harness on the vehicle make sure that the ground location isn't painted or coated with anything. If it is you will need to scrape down to bare steel.

expert reply by: Michael H