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Troubleshooting S.H and P.L Codes on Tekonsha Prodigy P2 Brake Controller


I believe I have a prodigy P2 brake controller I am receiving an s. H. And a p. L. Error code Im not sure what they mean when I purchase the truck there was no manual to the prodigy in it please advise


Expert Reply:

Those definitely look like Prodigy P2 # 90885 troubleshooting codes! You can verify this if the numbers you are seeing are blue. If they are red then this means you have the discontinued Prodigy P1 90185. Regardless of which one you have, the troubleshooting will be the same.

The S.H means that it is seeing a short on the brake wire during idle conditions or that non-Tekonsha test lights are being used. The P.L. code means that there is power interruption when you press the brake pedal.

Both of these codes can definitely be related to the same thing. Start off by checking the 7-Way connector on both your tow vehicle and the trailer making sure that they are clean and free of any corrosion or debris.

Next I recommend checking the wiring directly behind the controller. You should be seeing 12V power on the black wire, no power on the white wire, power on the blue wire when the manual override of the P2 is used, and power on the red wire when you press your brake pedal. If all of these look good then we can move on from here.

The next place I recommend checking is the brake controller wiring (blue wire) that runs from the controller back to your 7-Way. Look for any places where it may be pinched or damaged and replace accordingly.

If you are still having issues after running through this list just let me know and I can help you troubleshoot further.

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expert reply by:
Jon G

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