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Recommended 4-Way to 7-Way Adapter for 2013 BMW X5


Looking for a 7 way trailer wiring for my 2013 bmw x5. The only ones i can find on your website are 4 way


Expert Reply:

To install a 7-Way wiring harness on your 2013 BMW X5 you can use the Universal Installation Kit # ETBC7.

If you do not already have trailer wiring on your BMW, I recommend getting the Wiring Harness # 119190KIT by Tekonsha. This kit includes short circuit protection to help safeguard against electrical shorts and mis-wire situations. A 4-Way harness is required to install the # ETBC7 Kit.

If you are needing to wire your trailer, you can use the etrailer 7-Way Molded Trailer Plug with the Junction Box # e99011. To run wires from the junction box to the brakes and trailer lights, you can use the 10 Gauge wire, part # 10-1-1, 12 Gauge wire, part # 12-1-1, and 14 Gauge wire, part # DW04923-1, to properly wire your trailer. The reason that you will need to use 3 different gauges of wiring is because they all help control different functions on your trailer; some wires simply turn on a light bulb while other wires control your brakes. You will run the wires from the junction box to the appropriate locations using the attached diagram. I have also attached a helpful article and some demonstration videos about wiring for a trailer.

expert reply by:
Jon G

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