How to Fix Hazard Flashing Activating Brake Controller and Brakes

Question:

90 Ford diesel with a Voyager brake controller, when the hazard lights are turned on the brake controller activates in sink with the hazard lights.

asked by: William R

Expert Reply:

This is not an uncommon issue, since the Tekonsha Voyager Brake Controller # 39510 is wired in behind the stop light switch, it is activated by the brake light signal. The worst part occurs if you have the gain turned all the way up and you experience some brake pulsing when this happens- which can be especially fun.

To eliminate that from occurring you will need the Draw-Tite Pulse Preventer, part # 5501. The Pulse Preventer will isolate the brake controller from the vehicles flashers. This part will install where the brake controller is spliced into the wire from the cold side of the stoplight switch. This is typically the red wire on the brake controller.

Find the spot where the brake controller is spliced into the wire from the cold side of the stoplight switch. Then just past this (away from brake controller) cut the vehicle stoplight wire and install the Pulse Preventer inline with the yellow wire on the side that the stoplight switch and brake controller are on and the brown wire on the side going to the vehicles brake lights. This connection will stop the hazard signal from feeding back to the brake controller, eliminating the pulse problem.

expert reply by: Erik B