Where is The Wiring For Brake Controller On a 2019 Jayco Seneca Freightliner Chassis?
Updated 02/26/2026 | Published 04/26/2021
Question:
How do I install Tekonsha P3 Brake controller to a 2019 Jayco Seneca. Is there a wire harness I can purchase to connect the Tekonsha P3 to the Seneca. Thanks!
asked by: Luis A
Expert Reply:
To install the Tekonsha Prodigy P3 Trailer Brake Controller # 90195 in your 2019 Jayco Seneca on the Freightliner S2RV chassis the wiring is behind the kick panel in the drivers compartment. There is not a connector on the wires, they are simply terminated with tape. You will connect those with the wiring pigtail that is included with the brake controller.
You can use the longer Pigtail # 7894 if you wish to move the brake controller to the right side of the steering column. This pigtail is 34" long versus the 12" pigtail that is included with the brake controller.
Wiring should be as follows but be sure to verify this on your Seneca.
White - Ground
Red - 12V Constant Power
Red/White - Brake Signal
Blue - Brake Controller Output
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Carlo S.
2/26/2026
On my 2019 Jaco Seneca, super CI found the wiring harness for my electric brake control under the Driver's kick panel., and it had 6 wires. We wired the brake controller to the 4 wires. It recommended, and now When you push the brake pedal, the dashlights come on. And the blinkers actually work for about 30 seconds, what have I done wrong? The wires we did not use were the pink and the Brown\n We tried to find a plug and play harness, and I've had no success.