Getting Trailer Running Lights to Work on a 2005 BMW X5 Trailer Wiring Harness
Question:
HOW DO I HOOK UP THE NIGHT TIME TAIL LIGHTS WITH A CURT WIRING HARNESS FOR A 2005 BMW X5 TRAILER HITCH? WE HAVE TURN SIGNALS AND BRAKE LIGHTS FUNCTIONAL AT THIS POINT
asked by: James
Expert Reply:
Getting the running lights to work would require attaching the correct wire on the trailer wiring harness you are using to the correct wire on the 2005 BMW X5. It will be very similar to the video I have linked showing a typical installation of wiring harness # 119250KIT.
You will need to either use the included circuit tester with the wiring harness or # PTW2993 if you need one. Then test the taillight wiring to find the correct wire for the running light circuit. If you do have power at the 4-Way on the running like circuit but not on the trailer the issue is most likely a bad ground. Make sure the main trailer connector ground and all the grounds for the lights are attached to clean and corrosion free bare metal surfaces. Also make sure that the vehicle and trailer side connectors are free of dirt and corrosion.
Products Referenced in This Question
ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Converter
- Universal Fit
- 4 Flat
- Tekonsha
more information >
Product Page this Question was Asked From
Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Trailer Hitch
- Custom Fit Hitch
- Class III
- 600 lbs TW
- 6000 lbs GTW
- 6000 lbs WD GTW
- 2 Inch Hitch
- 600 lbs WD TW
- Concealed Cross Tube
- CURT
more information >
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