Where Does Blue Wire of 7-Way Usually Run When Installing on Vehicle

Question

Question:

If I was wiring a 7 pin trailer harness to my car myself, what do wire the blue to in my vehicle. Thanks

asked by: Mark S

0

Expert Reply:

The blue wire of a 7-way runs to the blue wire of a brake controller to activate the trailer's brakes. If you don't have a brake controller or a need for trailer brakes you'd simply not use that circuit. I attached a diagram that has the standard functions of a 7-way listed.

expert reply by: Jameson C

0

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Answer 1

Sounds like you have a Tekonsha Primus IQ brake controller part #TK90160. I attached a link to this page that has the owners manual/install instructions and then for a replacement wiring harness you'd want the part #20127.

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Answer 2

It sounds like there might be some other fuses that could have blown, or there are some shorts on your brake controller/7-way circuits. It is hard to know exactly where the problem lies, but the first thing I would check would be to test the manual…

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Answer 3

It sounds like you need to add a 7-Way RV style trailer connector to your 1997 Chevy pickup. Since you already have a connector, you will just need to add a 4 and 7 Way Installation Kit, #ETBC7. Though I am not certain if you have a 5-Way flat…

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Answer 4

You could indeed use an adapter like the Hopkins 6-way to 7-way adapter, part #47435. Keep in mind, there are two accepted ways of wiring a 6-way trailer connector. One uses the center pin as the 12-v feed, the other uses the center pin as the output…

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Answer 5

The Hopkins 6 Pole to 7 Pole Adapter, #47435, does have a pin for the brake output for a brake controller. This adapter will work for your set up as long as the center pin of the 6-way plug on your RV is for 12v power and the pin in the 10 o clock…

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Answer 6

Since wire color codes are NOT universal, we always recommend wiring by function, rather than wire color. If you look at the Trailer Wiring FAQ article I have linked you to, you can see some diagrams showing the proper way to wire a vehicle and…

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Answer 7

Hey Keith, how much of an extension do you need? Another option might be a ball mount that is longer overall than what you have but to pick that out I would need to know the drop of your current ball mount as well as the length you have now and how…

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Answer 8

Yes, it will work. You'll just need to cut the Lance 6-pin connector out and rewire it into the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector item #e99011. Here are the individual functions of that Lance 6-pin:…

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Answer 9

Hi Carl; we do have hitches available for your 2025 Ford Bronco. I recommend the Draw-Tite Max-Frame Trailer Hitch Receiver #DT37GR. This is the best option since it has an extra long receiver. The receiver makes it a lot easier to use accessories…

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Answer 10

Hey Tony, the kit you would need to convert your 6-way to a 7-way and wire up a brake controller is the part #ETBC7L which comes with everything you'd need. Then for a brake controller the P3 part #90195 would be a really great option as well.…

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Answer 11

Hey Steve, The AirLift airbags with internal jounce bumpers are not able to be added to a system without so you would need to get a whole new system. With that said the system with the internal jounce bumpers is going to create a much rougher ride…

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Answer 12

Hello Joe, thanks for reaching out. The Demco #DM8550046 you mentioned is for a flatbed truck with a recessed gooseneck ball so this would not work for your setup. Instead what you will want is the following: - Demco Recon Gooseneck-to-5th Wheel…

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Where Does Blue Wire of 7-Way Usually Run When Installing on Vehicle

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