Installing 7-Way Trailer Connector on 1996 GMC Jimmy

Question

Question:

Hello, I already have a 4-prong flat trailer attachment on my Jimmy with the 4 other wires free. I would like to have the instructions on how to wire for a 7 prong hookup, similar to the How To Install A 7-Way Trailer Connector On A 1994 GMC Jimmy posted earlier. Thanks!

asked by: Jeremy S

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Expert Reply:

If you take a look at the photo I edited for you, you can see how to wire the 7-way connector on the vehicle. Make sure to wire by function, not wire color.

Perhaps a better way of doing this would be to use an adapter like the # 37185. If you need to install a brake controller, you could use the ETBC7 install kit mentioned in the question you referred to. The 37185 adapter is included in the kit, and would plug directly into your existing 4-way, leaving 3 remaining wires to be attached. The white wire would be grounded to clean metal on the vehicle, the black wire which supplies 12-volts for any trailer accessories requiring power or to maintain a trailer-mounted battery would connect to the positive battery post via a 40 amp breaker included in the kit, and the blue wire would carry the output voltage from the brake controller.

I have provided links to some FAQ articles that you might find helpful. I have also linked you to an install video showing a brake controller being installed on a 1993 Suburban. Different vehicle, but the procedure would be similar if you were wanting to install a controller on your Jimmy.

expert reply by: Mike L

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click to enlarge

Answer 1

See the picture to the right for a wiring diagram of seven-way vehicle end trailer connector. If you click on it you can enlarge it. I have also included a trailer wiring FAQ page for you to check out.

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Answer 2

The problem that you are going to run into no matter what 7-Way you want to put on your trailer is that the color of the wires used is not standardized. Trailer manufacturers or people who rewire their trailers at any point can use any color they…

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Answer 3

Yes. It sounds like there is no signal being sent from your 7 way connector to your trailer, or it is not being received for the stop and turn lights. I recommend using a circuit tester like #PTW2993 to check the functions at your truck first. If you…

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Answer 4

I attached a diagram that shows how to match all of the wire colors of the Hopkins Multi-Tow 7-Way Blade and 4-Way Flat Trailer Connector #HM11141144 to the wire colors on your 2017 GMC Canyon.

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Answer 5

If both turn signals blinking at the same time is a new problem that has occurred after the harness had worked fine before, there are a couple of possibilities that may be causing the issue. First, the easiest thing to check are the trailer…

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Answer 6

Electric proportional brake controllers are required to be manually leveled by hand according to the parameters outlined in the installation instructions. Not all brake controllers have the same mounting range so you need to make sure you follow the…

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Answer 7

If you are looking for a power source for your brake controller, I do not recommend using a fuse tap. The brake controller's power needs to be ran through an appropriately sized circuit breaker and to the battery post. The installation…

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Answer 8

Hey Mark, so the correct Blue Ox base plate kit to use with the Blue Ox Ascent tow bar part #BX4375. is the part #BLU53FR. For lighting you can use #C96JR, and not have to worry about cutting into the taillight housing as this plugs inline with the…

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Answer 9

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 10

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 11

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 12

I did some checking and the hub/drum we offer that will work for you is the part #8-430-5UC3. This uses the same bearings as the 8-415 and will be an exact fit aside from the fact this is a non-ABS setup and the 8-415 came in an ABS setup and non-ABS…

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