How to Determine if a Brake Light Relay is Required to Flat Tow a Vehicle
Question:
Will the brake lights continue to operate after 15-30 min of nonuse? Will they go to sleep after a period of time thus not requiring a brake light relay, but just a brake switch to operate the motorhome dash indicator light?
asked by: Will H
Expert Reply:
To determine if your 2014 Jeep Grand Cherokee will require a brake light relay like part # RM-88400 you need to answer the following questions:
Are you using a supplemental braking system that depresses the brake pedal in your towed car?
No - You do not need a brake light relay.
Yes - You may need a brake light relay. Continue on to the next question.
Do the brake lights on your towed car illuminate while the engine is off?
No - You do not need a brake light relay.
Yes - You may need a brake light relay. Continue on to the next question.
Do your towed car's brake lights act as both the brake signals and the turn signals?
No - You may need a brake light relay. Continue on to the next question.
Yes - Your towed car has a combined lighting system. You will need a brake light relay to ensure proper activation of its signal lights.
Does your towed car have separate brake lights and turn signals?
No - Your towed car has a combined lighting system. You will need a brake light relay.
Yes - Your towed car has a separate lighting system. You may need a brake light relay. Continue on to the next question.
Are you wiring your vehicle with a six-diode kit or a TowDaddy custom wiring harness?
No - You will need a brake light relay to ensure proper activation of your towed car's signal lights.
Yes - You do not need a brake light relay.
I attached an install video for you to check out as well.
Product Page this Question was Asked From
Roadmaster Brake-Lite Relay Kit for Towed Vehicles
- Tow Bar Braking Systems
- Brake Light Relay
- Roadmaster
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John
4/22/2024
If I have the six diode wiring system, where would I hook my even brake terminal one to make it work?