Troubleshooting Prodigy P3 Brake Controller that Blows Truck Fuse When Connected

Question

Question:

I will abbreviate what I have discovered and or concluded: 1. P3 Brake Controller installed operating perfectly. 2. About a week ago post July 5th noticed the controller did not light up at ignition with trailer not connected as usual. 3. Checked the 30 amp fuse for the controller. Blown. 4. Replaced the fuse, started truck, fuse blown. 5. Purchased another fuse, repeated problem, fuse blown. 6. Disconnected P3 from truck, replaced fuse, did not blow. Reconnect P3, re fuse after checking, POP, fuse blows. Truck not running. 7. Using blunt ended pigtail on controller, controller lights up when terminals are touched. Wondering: IF controller active during boat launch and plug got wet could this damage the controller. I will get another fuse and plug in the old Reese controller and see if the fuse blows. Any Advice at this point? I have been talking to Jaminson C. Thanks

asked by: Paul A

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Expert Reply:

It's very possible the P3 # 90195 that you have was damaged and now has a short that fries the fuse your truck has for a brake controller. This would be a rare occasion for this to happen as the P3 is normally really reliable, but based on what you've tried already I'd say it's pretty likely at this point.

I think connecting a different controller like you mentioned would be a great way to hone in on where the problem is. I'd try that to see what happens and then go from there.

I did attach a help article with more info on troubleshooting brake controllers for you to check out as well.

expert reply by: Jameson C

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Answer 1

You can refer to the linked help article for details on the wiring under the hood of your 2003 Silverado that you need to connect for trailer brake controller installation. There are both red and blue wires, as you noted. These are normally located…

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Answer 2

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 3

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 4

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 5

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 6

Hey Paul, there really isn't any downside to going with the 7500 rated Air Lift kits like the part #AL57575 over the 5k rated kits aside from them costing a little more so for you I would definitely recommend the #AL57575. Are you wanting a…

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Answer 7

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 8

No, I do not Paul and I doubt Curt or Draw-Tite make anything other than a 4-way for the hybrid model. Aftermarket wiring harnesses for vans are typically limited to 4-way connectors like the item #C63RV for LED lights or the item #C32MJ for…

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Troubleshooting Prodigy P3 Brake Controller that Blows Truck Fuse When Connected

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