Troubleshooting Running Lights Not Working on Trailer Wiring of 1999 Ford Ranger

Question:

the 118241 light connector will fit 2002 ford ranger, is it the same hook up as1999 range. my tail is not working thru the factory plug in is their a fuse for trailer lights, the tail lights work on pick up ok. what one will fit, the one they show is driffrent,118344 wont work to toile light assemble wire plug in. thanks

asked by: Bill P

Expert Reply:

For your 1999 Ford Ranger the # 118241 is a confirmed fit. If that is what you have installed on yours and the running lights aren't working the first thing you will want to do is test the pin with the brown wire behind it on the 4-way for voltage when the headlights or running lights are on.

I attached a video that details how to do this. If there is voltage there then the problem is on the trailer.

Make sure that the trailer side connector are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should also be attached to clean and corrosion free bare metal surfaces. If there is anything between a light ground and the metal trailer frame or if the trailer has an aluminum frame, tilt bed, or folding tongue, any of these things can interrupt the ground. Running jumper wires from the light grounds to the main trailer connector ground can help.

If the problem is on the vehicle side then I would first recommend you double check how the harness is installed on your vehicle, make sure all of the connections are good and tight. You should check all towing related fuses and relays as well.

expert reply by: Jameson C