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Which Trailer Wiring Harness is Recommended for 2012 Nissan Frontier


What is the difference between part #118263 and part #118525. Why in part 118525 does it contains relays what are they for. I have a 2012 frontier with the pin by the spare tire ready to plug n play i figure part 118263 will do well still im wondering what are the differences. Thanks in advance.


Helpful Expert Reply:

If your 4-pole is damaged and needs replacing or the plug on the driver's side frame rail is active but you don't have the 4-pole, you'd use the # 118263. To determine if the plug is active, you'd use a circuit tester, like part # 40376. Have a helper activate each lighting function (right turn, left turn, running lamps and brakes) and see if the sockets on the plug are active. If they are, you'll just need the # 118263.

If the plug isn't active, you'd use the # 118525 which includes the plug provided with part # 118263 as well as the wiring harness and the relays that activate the tow package. If you simply get the # 118263 without having the relays and wiring harness in place, the trailer connector will not work.

You can see instructions and install videos for both wiring harness options by clicking the provided links.

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helpful expert reply by:
Mike L

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