Brake Controller Installed on 2015 Ram 2500 Only Showing 1 Volt of Output When Tested

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Question:

Hello, I have a 2015 Ram 2500. I found my 7prong wiring harness “trailer break” was only receiving 1 volt when actuated. I changed out every fuse I could find, including f11. I also replaced the 4/7 prong harness located on the rear bumper. All of the other prongs are working appropriately. Do you have any ideas before I try replacing the factory female 7 plug? Thanks

asked by: Josh

0

Expert Reply:

What's going on when you're testing the controller? Which controller do you have?

If you have a proportional brake controller, you're only going to get a tiny bit of voltage on the output circuit with the brake pedal (which tells the controller whether a trailer is connected or not), because a proportional controller will only output voltage with the pedal when the vehicle is in motion. If you're testing using the manual brake switch on the controller, you should be getting voltage commensurate with how high the gain on the controller is turned up.

If you do not, you'll want to sever the blue wire exiting the rear of the controller (leave enough slack so you can easily reconnect it) and test the wire with a # 40376 circuit tester while activating the manual brake switch. If you get power, then there's a break somewhere between the controller and the 7-way. If you don't get signal, then the controller is faulty and should be replaced.

If you have a time delayed controller, you're supposed to see voltage on the 5:00 pin in the 7-way with both the manual switch and the brake pedal.

I'll link to an article that shows additional troubleshooting steps.

expert reply by: Mike L

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Answer 1

Actually, the P3 now has the upgraded axis accelerometer like the P2. The Tekonsha P3 Trailer Brake Controller #90195, will work with both electric over hydraulic brakes on the trailer as well as electric brakes. It has a menu option on the display…

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Answer 2

Your 2014 Ram 1500 will have a connector under the driver's side dash that your brake controller will plug right into with an adapter. If you have the Tekonsha Prodigy P3 #90195, for example, you will simply need to use the Custom Wiring Adapter…

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Answer 3

What is the axle capacity that you have? We don't have an easy way to look up what you have with the info you listed but if you get me the axle info I can see what you may need.

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Answer 4

The Provider ST235/85R16 Radial Trailer Tire #TTWPRG235R16 that you referenced weighs 59 lb.

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Answer 5

The best all-around brake controller we offer that has been confirmed to fit your 2014 Ram 1500 would be the P3 Brake Controller part #90195. This controller has state of the art technology that will activate your trailer's brakes in proportion…

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Answer 6

To replace your NOK AD2527E seal you can use #168233. It has an inner diameter of 1.688 inches and an outer diameter of 2.332 inches. Based on what I could find on the NOK AD2527E the inner diameter is the same and the outer diameter is 2.328 inches.…

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Answer 7

For your 2013 Ram 2500 the correct install harness you would need to install the P3 part #90195 would be the part #3023-P which has been confirmed as a fit and not the #3021-P that you referenced. I attached an install video that shows this harness…

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Brake Controller Installed on 2015 Ram 2500 Only Showing 1 Volt of Output When Tested

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