Is a Brake Light Relay Needed when flat Towing a 2000 Jeep Wrangler Behind an RV

Question:

I recently acquired a Roadmaster Falcon 2 and a Brake Buddy supplemental braking system to flat tow my 2000 Wrangler. I need to order the 035 base plate adapters and the RM154 wiring kit, my question is do I need anything to isolate the brake pedal from also firing the brake light, not sure what happens to the bulbs when power is provided from 2 sources unless this done through the diodes

asked by: Steve W

Expert Reply:

You will most likely need a brake light relay when flat towing your 2000 Jeep Wrangler. The # RM-88400 relay is required to prevent the towed vehicle's brake signal from overriding the turn signal from the RV when applying the brakes during a turn.

I have linked a video showing an example installation of the relay but it is on a much newer Jeep so some things will likely be different on your 2000 Wrangler.

expert reply by: Michael H