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Troubleshooting No Power to Tekonsha Voyager Brake Controller 39510 in 2001 Dodge Ram 2500


Hi I have a tekonsha voyager installed on my 2001 Dodge Ram 2500. Its been on the truck since I bought it. Ive. Ever had an issue with it. Tonight I hooked up to my trailer and I had no power to the unit at all. Of course the light only comes on and it only has power when a trailer is connected to the truck. The unit itself is wired into a plug that plugs directly into the truck harness. I checked the wires between the unit and the plug and everything is hooked up and tight. Since it is plugged into the harness I dont know where the power to the unit comes from especially since it only has power when a trailer is plugged in at the hitch. Id like to know how to fix this problem or if my unit just went bad. Thanks for any help in advance.


Expert Reply:

It sounds like your 2001 Dodge Ram 2500 has a factory-installed 7-way and that your Voyager brake controller # 39510 is installed using wiring adapter # 3020-P, which connects under the dash.

This 4-wire harness carries the +12V power to opeate the controller (black wire), the brake light switch signal that triggers it when you press the brake pedal (red wire), the output for the brakes that goes to the 7-way (blue wire) and the ground (white wire).

You can use a circuit tester like # 40376, shown in the linked video, on the black wire leading to the controller to see if operating power is reaching it. This wire should carry power whether or not a trailer is plugged in. If yes, and the controller does not operate then it could have internal damage. (16-years of use from a brake controller is still pretty good!). If there is no power reaching the controller then you will want to check your fuses.

You can also check for any corrosion on the contacts at both the back of the controller, the two ends of the wiring adapter # 3020-P and also at the OEM connector. After so many years of use it is not unreasonable that some corrosion could have developed.

If your harness is good but the controller is dead you can use the same harness to install another Tekonsha unit like the Primus IQ # TK90160

expert reply by:
Adam R

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