Brake Controller on 2020 GMC Acadia Only Sends Power to Trailer Brakes with Manual Override

Question

Question:

2020 gmc acadia the white with blue stripe is the brake signal wire should have power when pressing on the brake but its dead no power at anytime however the trailer lights all work just no brake unless i manually press the lever

asked by: Marc

0

Expert Reply:

It sounds like you have a proportional brake controller, like the Prodigy P3 # 90195, installed on your 2020 GMC Acadia. Since a proportional brake controller uses an internal inertia sensor to help determine how much power to send back to the trailer brakes it won't send any power when you are sitting still. That's why you're able to apply the brakes with the manual override and not with the brake pedal.

The lights for your trailer are actually on separate circuits from the trailer brakes which is why they work when you press your brake pedal. The lights should come on when the lights on your pickup come on.

expert reply by: Jon G

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Answer 1

The biggest clue for determining what bearings you need came from the last number you listed. Thank you for that! You have basically the part #8-258BTUC1 hub and the correct bearings would be the kit part #DL21792 that comes with the correct…

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Answer 2

The tire and wheel combos we carry like the part #AM31994 are not machined balanced. You can have the tire and wheel combos balanced at a local tire shop if you wanted to. What our tire manufacturers will do is line up the light spot on the tire…

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Answer 3

Yes, the Curt Echo Wireless Trailer Brake Controller #C51180 will work with the factory towing package on your 2021 GMC Acadia AT4. Since you already have a functioning 7-way you will simply be able to plug in the Echo to set it up and use it with…

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Answer 4

If you have the tow package on your 2018 GMC Acadia Denali then you simply need to use the included pigtail to install your Prodigy P3 #90195 to the wires under your driver's side dash. If the wires on your Acadia are not labeled, then you will…

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Answer 5

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 6

The difference between an load range C and load range D tire in the same size is the capacity and psi rating. The two tires will still have the same dimensions and fit on the same wheel. The D rated tire has a higher capacity. For a ST175/80D13 like…

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Answer 7

The 5.30-12 tires, being wider, are going to make more contact with the road. This means that the noise, and heat build up will be higher than a 4.80-12 tire but the rolling resistance will actually be less because the tire is larger diameter. The…

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Answer 8

Load range B trailer tires are going to have a lower capacity than C load range tires. Basically that, psi rating, and the ply rating are the only differences. A higher load range tire would last a little longer than lower load ranges of the same…

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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

Since both a ST145/R12 size tire, like the Kenda Karrier S-Trail #AM10130, and a 5.30-12 size tire, like the Kenda K353 #AM10068, fit a 12 inch wheel, a ST145/R12 size tire can replace a 5.30-12 size tire. Keep in mind that these tires do have…

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Answer 12

The difference between load ranges varies based on the tire size and brand. When comparing two tires of the same size and brand, a load range D tire will always have a greater weight capacity and psi rating than a load range C. However, when…

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Brake Controller on 2020 GMC Acadia Only Sends Power to Trailer Brakes with Manual Override

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