PL Error Code on Tekonsha Primus Brake Controller on 2007 Isuzu NPR Truck

Question:

ok were wiring a isuzi truck model 2007 npr 6.0 gas rack truck, were still getting a PL code on brake controller, checked ground, and ran like suggested to neg side of battery, and still getting code

asked by: Darrel W

Expert Reply:

The PL error code on the Primus brake controller # TK90160 indicates that power is interrupted when stepping on the brake pedal. Check the connection of the red wire. It should be attached to the brake switch wire that has power only when the brake pedal is pressed. If it has power at any other time then it is not the correct wire.

I have also included some links to testing and troubleshooting brake controllers that should also help.

expert reply by: Michael H