Troubleshooting Roadmaster Brake-Lite Relay Kit for Towed Vehicles # RM-88400 Light Issues

Question

Question:

When the car is connected to the coach and the brake controller is installed, only the turn signal lights illuminate when the brakes in the coach are pressed. The installer says this is correct? I don’t believe it can be? Thank you

asked by: Jennifer L

0

Expert Reply:

Your brakes lights should be illuminating when the brake pedal is depressed when using the Roadmaster Brake-Lite Relay Kit for Towed Vehicles # RM-88400. When using the relay kit, your vehicle's lights should mimic those of your RV.

I would check the wiring to ensure the Relay Kit was wired correctly, I am attaching a wiring diagram for you to see how it should be connected.

expert reply by: Thomas M

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Roadmaster RM-88400 Wiring
(click to enlarge)

Answer 1

Yes, when installing the Roadmaster Brake-Lite Relay Kit for Towed Vehicles #RM-88400 you should have wired it based on the "Normally Closed" diagram since you have a Ford with neutral tow.

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Answer 2

The Roadmaster Brake-Lite Relay Kit for Towed Vehicles #RM-88400 will keep the brake signal from your 2017 Jeep Wrangler Unlimited overriding your turn signals so if the brakes are still overriding the turn signals then that means the unit wasn't…

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Answer 3

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…

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Answer 4

If the red indicator light is coming on for your Roadmaster InvisiBrake Supplemental Braking System #RM-8700 either something is causing your brakes to be applied or most likely the brake switch you have installed has a loose connection which is…

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Answer 5

The LED Display Monitor for BrakeMaster Systems #RM-300065-00 should light up each time you brake with your motorhome as the Roadmaster InvisiBrake Supplemental Braking System #RM-8700 is supposed to activate when the brake lights on your RV are…

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Answer 6

Yes, there is a 20 amp fuse installed on the breakaway system that comes with the Roadmaster InvisiBrake Supplemental Braking System part #RM-8700. If this fuse is removed then the breakaway system will no longer be active and the brakes would not…

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Answer 7

I spoke to my contact at Roadmaster and when I described your situation to him he said that as long as the Invisi-Brake was installed correctly you would just need to turn up the pressure slightly to get it to want to function more consistently.

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Answer 8

I spoke with my contact at Roadmaster regarding the issues you are having with the Brake-Lite Relay Kit #RM-88400 on your 2015 Jeep Cherokee. There are a couple possible reasons for why you are having trouble with the push-button start and also the…

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Answer 9

It sounds like you need to obtain a stop light switch signal from the 2015 Winnebago Forza and then have this sent to the center pin on the 7-way in order for the Smart Brake Supplemental Braking System to work properly. If that is the case then I…

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Answer 10

Normally you can find the brake light switch under the dashboard at the top of the brake pedal. There could be a number of wires attached to the switch so you can use a tester like part #PTW2993 to test the wires. Since the auto manufacturers can use…

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Answer 11

We've had a few customers that have installed the Roadmaster Universal Stop Light Switch Kit #RM-751000 report back to us that they had to paint the firewall area white so that the sensor could see it. So based on the color of yours and what you…

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Answer 12

For the Redarc Tow-Pro Elite Trailer Brake Controller #RED44FR is an easy installation with the Tekonsha Wiring Harness #3041-P. You will just use the white connector of the harness along with the wire length and cut off the other end of the…

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