0.L and 5.H Error Codes on Tekonsha Primus IQ Brake Controller

Question:

At first it worked great for about 8 miles setting the control setting . Now just get two codes o.L at first and 5.H. . I see what those codes say but still dont understand it and why did it work so well at first.

asked by: Marcus .

Helpful Expert Reply:

For reference, the o.L code means that your brake controller is seeing an overload condition during operation and the 5.H code indicates a short on the brake wire.

If you had to do any hard-wiring during the installation of your Tekonsha Primus IQ # TK90160, its quite possible that the initial connections were not sufficient and have since either loosened or have become disconnected; it's less likely, but still possible, that the wires are damaged. I would particularly focus on the blue brake control wire, but pay attention to any wires that could be exposed and touching each-other.

I recommend going back through the installation process and re-connecting all of the wires, making sure that they are connected securely and any exposed wires are covered over with electrical tape or replaced with new wires. You can use # 16-1-1 (sold by the foot) to replace any of this wire.

If you've gone through all of the wiring and you're still getting these error messages, please let me know and I can recommend a few other steps to go through to get your brake controller back functioning again.

expert reply by: Erik B