Troubleshooting Flashing PL Code on Trailer Brake Controller

Question

Question:

Getting a flashing code PL

asked by: Tom

1

Helpful Expert Reply:

The flashing PL code on a trailer brake controller, such as the Tekonsha Prodigy P2 # 90885, indicates a power interruption while the brake pedal is depressed. This basically means that when you apply the brakes in your vehicle, the voltage for some reason is not getting back to the trailer brakes.

This can be caused by a few things. I recommend first checking the brake controller wiring and all of its connections to the vehicle. Make sure the red wire is attached to the brake switch wire that only has power when the brake pedal is pressed. Look for any corrosion or breaks in the wiring leading back to the trailer connector and simply fix as needed.

You will want to do the same thing on the trailer side, checking the wiring and connector for any corrosion or damaged areas. Also make sure all your ground connections are made to clean, bare metal surfaces free of any debris.

If you are unable to resolve the issue, please let me know and I will be happy to look into this further.

expert reply by: Chris R

1

Answer 1

The PL code will be displayed when the Prodigy loses voltage on the black wire while either the brake pedal or the manual lever is being applied. This may be caused by a loose connection or I have also seen a faulty circuit breaker case this as well.…

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Answer 2

It sounds like you installed the Draw-Tite Activator Trailer Brake Controller 5100 in a vehicle with an integrated factory brake controller. If that is the case, installing an aftermarket brake controller like the Activator will cause the instrument…

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Answer 3

There are basically 3 possible causes leading to the brake controller to read that it is not connected to the trailer even if the trailer is connected. Since it shows the code with the trailer connected, it could be a short or open circuit on the…

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Answer 4

Hi Dave; since you just wired the Tekonsha BRAKE-EVN Trailer Brake Controller #TK28BR I would double checking the wiring since that is likely the cause of the power interruption error. Make sure your red wire is secure and only getting power when the…

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Answer 5

The code ".c." indicates that the boost feature is engaged or the trailer is connected. The best route to fix this issue is to trace the tow package wiring from the 7-way as far foward as possible, looking for any damaged sections. I would…

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Answer 6

I'm sorry that this happened to your brake controller. I am happy to do research to help get this issues resolved. If when testing the breakaway system and the pin was pulled with the battery connected backwards. This would compromise the brake…

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Answer 7

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Answer 8

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Answer 9

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Answer 10

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 11

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 12

Since the pin weight of your camper is 2.1k, I recommend going with the LoadLifter 5000 opposed to the 7500. While technically there is not reason you couldn't use the 7500 kit, it really is not necessary for a camper like yours. Generally the…

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Troubleshooting Flashing PL Code on Trailer Brake Controller

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