Roadmaster 751490 Custom-Fit Brake Light Switch for Select Jeep Wrangler Models

Why do you need a brake light switch? Brake light switches are necessary only if you're installing a supplemental braking system monitor, and the vehicle's OEM brake light switch doesn't work when the vehicle is in tow mode. This custom-fit switch is only activated when the brake pedal is depressed. If you know when the towed vehicle's brake pedal is depressed and released, you know if the supplemental braking system is positioned properly and working as it should. If the brake lights do not work with the towed vehicle's ignition key turned to the "tow" position, you need a brake light switch kit to provide a signal to the supplemental braking system.

Roadmaster Custom-Fit Brake Light Switch For Use with Supplemental Braking Systems that Move the Towed Vehicle's Brake Pedal