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

0

Answer 1

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 2

According to Blue Ox, it'll take an experienced installer about 4 to 5 hours to complete the installation of their #BX1128 Base Plate Kit on a 2016 Jeep Grand Cherokee. The install isn't what I'd call super-difficult, but the installation…

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Answer 3

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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Answer 4

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 5

The #84 spindle is just a common way to identify the spindle dimensions typically used for 3,500 lb axles. So instead of listing out the parts, people can just say they have #84 spindles and it's easier to know what fits it. The CE Smith Trailer…

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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

Even though I cannot comment specifically on the grease you used because I am not familiar with it, I can tell you the best grease for trailer bearings is a a grease with a rating of GC-LB, which just means it is made to withstand very high…

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Answer 8

The two sizes you mentioned are pretty similar and fit many of the same 15 inch wheels. The 205/75-15 fits rim widths of 5 inch to 6 inch whereas the 225/75-15 fits widths that are 5 inch to 6-1/2 inch. The 205 is 27.1 inches tall and the 225 is 28.4…

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Answer 9

Hey Clarence. There's no way to look at a tire or wheel and tell if it's a 5 on 4-1/2 or a 5 on 5 but you can take a real quick measurement to figure it out. If you'll look at the picture below you'll see a wheel with a red line on…

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Answer 10

Hi Kyler! We definitely have center caps and lug nuts that you can use, but the Kenda Karrier KR35 ST175/80R13 LRD Radial Trailer Tire w/ 13" Aluminum AM03 Wheel - 5 on 4-1/2 #KE34TJ does not include them. With that said, I recommend the…

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Answer 11

Great question, William! The Karrier ST225/75R15 #KE63KV is a KR35 while the Karrier ST225/75R15 #AM10303 is a KR03 according to Kenda. There is a slight variation in the tread pattern and from what Kenda says about them it looks like the KR03 is…

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Answer 12

Hey Dave, for a saltwater boat trailer, powder-coated wheels wouldn't be my first choice, but they can still last quite a while if you're good about rinsing them thoroughly after each launch and sealing any chips or cracks in the finish as…

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

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