Troubleshooting Curt Spectrum Brake Controller # C51170 in a 2021 Chevrolet Silverado 2500HD

Question

Question:

I did not buy this part from you, but, you have a great wealth of information on all the things Ive researched so far. I do have a Power Watchdog Surge Protector from you. I installed a C51170 but received no calibration lights and it send a constant 12v to the braking pins. I wrote to Curt, who sent out a replacement directly. Ive installed the new one brain and knob to still receive no calibration lights, but, also no 12v to the braking pins. Have you come across this issue? Please feel free to ignore me if I am out of line here. Do you have any successful installs on this truck? What would be the best replacement for this unit of proven success? Thank you so much. Cheers.

asked by: Murray C

1

Helpful Expert Reply:

We have not yet been able to install a Brake Controller # C51170 on a 2021 Chevrolet Silverado 2500. The thing that I do not like to hear is when you replaced the controller your issues changed.

I would begin by checking the Curt Custom Wiring Adapter # C51525 for the ensure that it is receiving the correct power from your Silverado. You can use a Test Light # PTW2992 or Multimeter # PT29ZR to test the adapter wiring. With the ignition on you should have constant 12 volt power to the black wire and power on the red wire when you press the brake pedal. The white wire should have continuity to a 12 volt ground source. If you do not have power to these circuits then you may have a fuse or relay that is missing or needs replaced. There is also the possibility that the computer in your Silverado may need flashed from the manufacturer to allow power to these circuits.

expert reply by: Bud M

1

Answer 1

You sure can! You'll just need the correct brake controller wiring harness, as the 2021 Tahoe actually has a connector under the dash instead of the blunt ended wires your 2021Tahoe used. For your 2021 Tahoe, you'd need the #3064-P…

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Answer 2

If your 2022 Chevrolet Tahoe does not have the factory tow package then the plug may not be there. If this is the case you would need to hardwire in a brake controller. If your Tahoe does have the tow package then the plug will be under the dash.…

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Answer 3

The Tekonsha P-3, item #90195, is an excellent brake controller. Your brake controller wiring will be under the dash below the steering column a bit to the left. There is no connector so you will not need an adapter. You will connect the wires…

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Answer 4

I recommend the Redarc Tow-Pro Elite Brake Controller for Tekonsha Harness item #RED63RR. This brake controller and harness will install inside your Silverado without cutting or splicing wires using the Tekonsha Plug-In Wiring Adapter item #3064-P.…

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Answer 5

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 6

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 7

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

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Answer 8

You do have the option to utilize the air brakes on your 2023 Freightliner Cascadia to control electric trailer brakes using the Hayes Air Actuated Trailer Brake Controller, part #HA100400C. However, we mostly recommend just using an electric brake…

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Answer 9

The trailer brakes work on a separate circuit than the lights. You have a couple of options to control the electric brakes on the trailer. One option is to use an air over electric brake control, #HA100400C. This unit connects to the air brakes on…

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Answer 10

The Redarc Tow-Pro Liberty #RED24FR is the way to go over the Elite #RED44FR as you get the nicer functions of the Elite at a lower price. The Elite has the ability to be the more preferred proportional style of controller as well as a time-delayed…

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Answer 11

If your vehicle has a factory brake controller plug, you can simply use the Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers – Ford, Item #3034-P, which will connect to the vehicle plug and the brake controller. On the new E-450…

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Answer 12

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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