Troubleshooting P. L. Code On Tekonsha Primus IQ Brake Controller

Question:

I have installed a 7 blade witeing harness to my 2007 Jeep Grand Cherokee limited, I also installed a Primus iq break controller that I had in my last Jeep. I am getting the pl code, I have checked all of the wires and started out with the ground to the negative battery terminal.

asked by: Landon M

Expert Reply:

The P.L. error code on your Tekonsha Primus IQ brake controller # TK90160 is a power interruption while brake pedal is depressed. This is most likely a brake switch or wiring short. I recommend checking the red brake wire coming from the cold side of the switch to ensure it is cold when the brake pedal is not pressed and getting 12V when it is pressed. I recommend using a circuit tester like # PTW2993 to check this. If the wire is not getting power, probe the wire to find the short and replace the wire as needed. If the wire is good, then the brake controller itself is not working properly.

expert reply by: Jason S