Trailer wiring harnes question. - TerrainForum.net: GMC Terrain Forum
 
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post #1 of 3 (permalink) Old 05-04-2019, 02:52 PM Thread Starter
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Trailer wiring harnes question.

I need to add a 4 prong plug to my 2019 Equinox that matches with the plug on my trailer lights. I found this plug up under my rear bumper cover and was wondering if this is the plug I tap into. If it is where can I find a jumper that with let me mate up my trailer plug? If it's NOT te hook up then what is it?
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post #2 of 3 (permalink) Old 05-04-2019, 08:52 PM Thread Starter
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Never mind, I found the answer. It is the trailer lights plug.
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post #3 of 3 (permalink) Old 06-13-2019, 07:30 PM
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Yes, but 2 wires are to drive left and right relays and 2 are for the power to the contacts of those relays. The parking lights are good to go. The gm hitch comes with harness that has the relays. Relays get tied above the hitch. I have pin numbers if needed.

I'm still trying to find a signal that the car is turned on in the rear area to drive a relay for sending battery voltage to a 7pin. Don't want to drain car battery when parked.
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