Trailer wiring harnes question. - GMC Terrain Forum
LinkBack Thread Tools
post #1 of 3 (permalink) Old 05-04-2019, 03:52 PM Thread Starter
Jr. Member
Morgan Garret's Avatar
Join Date: May 2019
Posts: 7
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?
Attached Images
File Type: jpg 20190504_142211_resized.jpg (298.9 KB, 30 views)
Morgan Garret is offline  
Sponsored Links
post #2 of 3 (permalink) Old 05-04-2019, 09:52 PM Thread Starter
Jr. Member
Morgan Garret's Avatar
Join Date: May 2019
Posts: 7
Never mind, I found the answer. It is the trailer lights plug.
Morgan Garret is offline  
post #3 of 3 (permalink) Old 06-13-2019, 08:30 PM
Jr. Member
Join Date: Jun 2018
Posts: 23
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.
Yuiop is offline  

Quick Reply

Register Now

In order to be able to post messages on the GMC Terrain Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome