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Is Brake Light Relay Needed with Roadmaster EvenBrake Installed In 2011 Jeep Wrangler

Question:

my jeep has the diodes to the rear lights they work with my motor home when I turn on my motorhome lights the jeep lights come on when I applie my brakes and turn singal the lights work do I need to use the brake lite relay

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Expert Reply:

You need the brake light relay if, and only if the turn signals are overridden by your towed car's brake signal when your supplemental braking system presses the towed car's brake pedal. If everything is working properly though, you will NOT need the relay.

We have a quick checklist you can run through to easily determine if the relay is needed.

To determine if a brake light relay is needed to properly wire your vehicle to be towed, 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.

According to Roadmaster, a battery disconnect # RM-766 and a 12-volt outlet # RM-9332 would also be needed. We have several help articles relating to flat towing that you might find helpful. To view them, simply click the links.

expert reply by:
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Mike L

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