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Just_Lee
Explorer
Jun 09, 2013

Brake Light Question

I have a 96 Tracker all set up to tow and I have a question.

My brake lights on the Tracker work even with the key off. I have the Ready Brake braking system installed.

The Tracker gets power to the brake lights from the Motor Home AND when the brakes are applied with the Ready Brake.

Should I be concerned that the brake lights are getting power from 2 sources? Right now I disconnect the Battery on the Tracker, but it is a pain.

Thanks LeeB
  • Just Lee,
    This is one of those things that never is realized when wiring things a certain way and, the use of an auxiliary braking system like Ready Brake is used. By a certain way I mean, using the stock tail lights as toad lights. I've been doing it that way for decades without any issues. Let's say you wired your toad so that the original tail light bulbs are also used when towing it. Now, this is also assuming that you "DON'T" have amber turn signals on the toad. That's a whole other set of circumstances.

    But, here's the deal. You wire your toad so the original tail light bulbs are activated when using the motorhome brakes. And, when you put a turn signal on in the coach, your toad will display the same signal, correct? Ok, all is fine. But, here comes the "Ready Brake" into the picture.

    So, you're approaching a turn, and, putting on the brakes of the coach. Your brake lights come on in the coach, and so do the toads and, you put your turn signal on. Now, normally this is not an issue and all will work fine. But, the Ready Brake is applying the brakes in the toad. As you have noticed, the key is off and, when the brakes are applied in the toad, the brake lights will come on. So now, you've got two sets of signals heading to those toad lights. Brake lights,(from the coach and the toad) and turn signals from the coach.

    But, you've got another set of signals coming from the brake light switch on the toad, also heading to those toad lights. Hmmmmm

    So, what happens? Well, you can't have two conflicting signals going to the same filament, in the same bulb. Only one is going to take priority. To tell you the truth, I'm not sure which one will be the winner because I've not followed myself or anyone else that has this issue. I will tell you what I did to remedy it. My solution is plain and simple.

    I cut the brake light wire from the brake switch in the toad and sent it up to very close to the door jamb. There I installed a tiny, double throw toggle switch. I then put that wire in the center position on the switch. On one leg of the switch, I sent it right back to the connection on the brake switch on the toad. On the other leg, I sent that wire all the way up to the front of the toad, and through the pig tail, all the way to the dash on the coach.

    I then installed an "LED" in the dash of the coach. Now, when the toad is hooked up and ready to be towed, I flip that switch, so that when the Ready Brake is applied, the signal from the brake pedal in the toad is sent to the dash on the coach. That way, I can tell if the brakes are being applied in the toad.

    But, when it comes time to drive the toad, then all I do is flip that switch to the other side and the signal from the brake light switch on the toad, goes to the brake lights on the toad, as is does normally.

    Yes, the diodes are installed in the system, down stream from the intersection where I tied into the factory wiring. That's so the signal from the coach doesn't go down stream all the way to the steering column and the front set of lights on the toad. Incidentally, I don't get those high dollar diodes from all the specialty places, I use the $3.00 pack from Radio Shack and it has worked absolutely flawless for well over 30 years. Good luck.
    Scott
  • you may find out that your TURN signal won't work on the towed. when you apply brakes on the MH at least, because the light will have power from the towed brake ...so it will not allow turn to flash (fed from MH).
  • I installed a plug n play wiring harness from Demco in my 2007 vue and to my suprise when I apply the brakes on the tow car the brake lights come on in the motor home.
    I was under the impression that the diodes would stop a back-feed to the motor home.
    When I called Demco I was told that the diodes in the harness would protect from a back-feed causing damage but the condition I have was normal and don't worry about it.
    Everything seems to work OK but if anyone has any additional info I am still interested.
  • I prefer to have my brake lights come on regardless of which brakes are activated. When the coach brakes are applied, all six brakes lights, three on each vehicle, come on. If the toad brakes are applied by my ReadyBrute/ReadyBrake tow bar without the coach brakes being applied for some reason, only the three toad brake lights will come on. That includes if they ware applied by the emergency breakaway cable. The diodes protect both vehicles from any cross feeding.
  • It already has Diodes so does that mean it does not feed back?

    Thanks I'll check out the Roadmaster site......
  • Good question. I'm not sure of the electrical system in a 96, but i would think that it shouldn't be a problem. However, to make sure it isn't, why don't you put in a couple of diodes?

    Ron

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