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Troubleshooting Turn Signals Not Working On Trailer Pulled by 1999 Ford Ranger


I installed a universal trailer lighting kit on mt trailer, i drive a 1999 ford ranger, once i connect the harness from trailer to truck i can only get runnig light, no turn signals, not sure if my truck is equipped with independent bulb turn signals and brake light or common, do you think i may need a converter, thanks


Expert Reply:

The Curt # C55325, is the correct wiring harness for your 1999 Ford Ranger, and it does have a converter. Your trucks turn signals are separate from the brake light circuit on your Ranger.

There could also be a ground problem. The taillights ground through the mounting studs on the trailer. Check to see that there is no dirt or corrosion that could cause a bad ground. Next, check the ground at the trailer connector. If you find no ground problems, you will need to check the wiring all the way from the 4-Way on the vehicle back to the taillights on the trailer. Check the wires every few feet for the proper signal using a circuit tester like # PTW2993. If you find a break in the wire somewhere, you will find it this way and be able to replace the faulty wire.

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