How to Test a Prodigy P2 Brake Controller

Question

Question:

I have an Tekonsha Prodigy controller. What is the best way to test it and se if it is working? Thanks

asked by: Jorgen

0

Expert Reply:

Does the display light up when your vehicle turns on? That would indicate that the controller has power and is grounding properly. If a trailer is connected it should read .c on the display and if there isn't a trailer connected it should read n.c. If you apply the manual override lever with a circuit tester on the brake output pin of your vehicle's 7-way you should see voltage register there. That would indicate the controller is working properly.

Lastly, you could try connecting it to a trailer with brakes and see if it functions properly.

If not, check out the FAQ article I attached on troubleshooting brake controller installs.

For a more in depth way to test the controller for if it doesn't seem to be working properly sever the blue brake output wire near the brake controller leaving enough room to reconnect it and then apply the manual slide. Using a circuit tester like part # PTW2993, you should get output to the controller side of the wire you severed. If the manual slide activates the trailer brake output wire properly, try the brake pedal. If the brake pedal activates the brake output properly also then the problem is farther back either in the vehicle wiring or on the trailer.

If either the brake pedal or the manual slide are not functioning properly you will need to test the wires going into the brake controller. Make sure you have power entering the brake controller on the black wire. On the red wire you will only want power when the brake pedal is pressed.

If there is power on the red wire before the brake pedal is pressed you have connected the red wire from the brake controller to the wrong circuit. You would then need to find the brake switch wire that has power ONLY when the brake pedal is activated.

If these connections check out and the brake controller is properly grounded then there is possibly a problem inside the brake controller.

I am including a link to a video that will show you how to test the wiring on a brake controller.

expert reply by: Jameson C

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Answer 1

The modern day equivalent of a 20.5 x 8-10 tire is going to be a 205/65-10. The dimensions are as close as you can get to the old size. We have several tires and tire and wheel combos in this size with various bolt patterns (if a wheel is needed).…

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Answer 2

The modern size equivalent of the 20.5x8-10 that you have currently would be the same size tire that is on the #AM3H340 that you referenced, 205/65-10. As long as the bolt pattern of your current hubs are 4 on 4 inch the wheels of this would bolt…

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Answer 3

I am assuming you are speaking of the fuse that activates the power feed to the brake controller. The 30 amp fuse is installed in the power distribution box as shown in the photo I have edited. The power distribution box is located under the hood,…

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Answer 4

Given the 11-year-old age of your vehicle (and presumably its 7-way factory-installed trailer connector) the issue you are having with no brake signal at the brake circuit pin on the 7-way could be a result of a corroded or damaged 7-way. You can use…

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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

Although the Tekonsha Prodigy P3 #90195 and Primus IQ #TK90160 electric brake controllers are very similar they do have some key differences as well. For one the P3 is designed to work with electric and electric over hydraulic brake systems. The…

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Answer 7

In order to properly adjust the Dexter electric brake assemblies on your travel trailer, you will first need to raise the trailer and check that the wheel and drum rotate freely. Remove the adjusting hole cover from the slot on the bottom of the…

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Answer 8

I'd give the Tekonsha item #90195 the edge for ease of use. The full LCD display provides the status of your braking system at a glance, while the item #RED44FR Redarc Tow Pro Elite uses colored LED's to indicate problems. The display of the…

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Answer 9

The blue wire coming from the brake controller to the trailer brakes is the brake power output wire used to tell the trailer to apply the brakes once given the response from the brake controller. Therefore, you should not have a constant charge to…

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Answer 10

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 11

Since your trailer's brakes worked on another truck that would indicate that the problem is on the truck side of the equation. First and easiest thing to check is to check for corrosion on your truck's 7-way. Some fine grit sandpaper can…

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Answer 12

The Prodigy P2, part #90885, and P3 part #90195, have brackets that are completely different styles so they are not interchangeable. The P2 uses just U shaped bracket, part #P7685, that connects to the controllers pocket, part #7686. The P3 also has…

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