Can Red Wire of Prodigy P2 Brake Controller be Connected to Circuit Other Than the Stop Light Switch

Question:

I am installing a Tekonsha 90185 brake controller on a 2000 Ford Ranger. I am having an issue trying to get access to the brake red wire connection on the brake peddle. Fact is...I cant fit under the dash to do the work. Can I just run a wire from the brake lights to the cab and make that the connection or will there be an issue with resistance etc?

asked by: Douglas H

Expert Reply:

If you can't find the cold side of the stop light switch to connect the red wire to when installing the Prodigy P2, part # 90885, you can use a dedicated brake light circuit.

The CHMSL circuit is often a good choice since it is only used for the brake lights and has no other functions. If you tap into a circuit that has multiple functions the controller will not work properly.

expert reply by: Charles S