Forum Discussion

glamisorbust's avatar
glamisorbust
Explorer II
Nov 06, 2014

For those of you wanting to install a brake controller...

My 1999 Holiday rambler endeavor CDS4-37 did not come with a trailer brake or any wiring provisions for that. So I installed one. It was a pain in the neck.

I had to run wires for the brake signal and the electric brake signal from the dash, through the firewall, and all the way down the frame of the coach. Then re-wire the rear and add a 7 pin connector. I had to take the whole dash apart to find a place to ground the controller and power for it.

It turned out to be quite a job, took me about a day start to finish. A call to holiday rambler verified that this coach did not come pre-wired for a brake controller.
  • They will just tell you that you'll have to run new wires from front to back. Hardest part was trying to figure out how to get the wire from under the dash through the firewall. I used a coat hanger and pierced through the foam they spray around the wires once they are installed. Looks like a big chunk of foam if you look in the generator bay up front. Used the coat hanger to pierce through that foam from the inside, and I taped two heavy gauge wires to that and pulled them through. Then got underneath and pulled 45' of wire through the frame rails and zip tied it all up. I do not have a hot wire for my crv. I am probably gonna add a battery cut-off switch to it so I can pop the hood and disconnect it.
  • We have a 2005 Endeavor and already have the 7 pin connector at the rear. The wires attached to the 7 pin connector are color coded to the SAE standard. The blue wire (for the brake) is there. That plugs into the chassis wiring and the corresponding chassis wire is white and is labeled “198 brake control”. I was able to follow the “198” wire to the back of our diesel engine but all of the engine and transmission wires were there also and I could not follow beyond that point. I can’t find the end of that wire in either the left front electrical boxes or under the dash. Also wire tied to the column is a 4 pin plug labeled “brake controller” but is only 18 gauge wire, not big enough for a brake controller. We aren’t able to install the brake controller because we can’t find the “198” wire in the dash.

    We have been trying to install a brake controller. Called HR and their techs said our coach was not wired for a brake controller. :h

    Any help would be appreciated.
  • Do you have a live wire (battery to battery) going back to your CRV from your coach?
  • Not to underestimate your talents but I did this and ran all new wires but did not have to install a 7 pin as my coach, 1994 Pace Arrow, already had one. Took me 45 Min start to finish. Any way now you got it done Good Job!!!
  • After doing a lot of reading online, some people are reporting that they found a 5, 6, or 7 pin connector behind the dash or on the steering column. They would all be white wires not labeled, apparently.

    As soon as I told the tech on the phone what model and year I had, he told me that none of the endeavors in that year came pre-wired, and that I would definitely have to run new wires.

    I wish I would have been able to finish the job in two hours, but it just took longer to do all the work than that. But now it's done and works perfect. Just wanted to give anyone who wants to do this a heads up that it's not as easy as just looking for labeled wires behind the dash!
  • While my motorhome is not a 1999 (it's a 2001) I've read that some coaches have the brake controller wires pre-wired into a connector that is tie-wrapped to the steering column, So it's just a matter of finding it and running wires to the back and installing a round 7.

    Any truth to this? What manufacturer has done this?
  • Ivylog's avatar
    Ivylog
    Explorer III
    I'm a little surprised you did not have extra wires to the back. Even my 98 Beaver had three extra wires in the dash to the back. Anyone with a Monaco product wanting to do this should call Monaco toake sure you already have wires to the back.
  • Really?

    I have a Fleetwood RV and installed my brake controller, a 7 pin wiring plug, and hooked it up to my brother's trailer in about 2 hours.

    And then I found the running lights tripped because the 18 running lights on my motorhome + the 14 on the trailer tripped the 20 amp circuit going to the headlight running lights. Unhooking the trailer, I found that I have only 9 volts to the rear brown wire (the one for running lights) and installed a 12 volt relay (thankfully had one sitting around) to power the trailer plug running lights from a separate 20 amp circuit (wire I had already run for the water pump directly from the coach battery bank).

    I guess I had it easy already because I already had installed a purple wire between the brake pedal and turn signal, and it was hooked up to the rear of my motorhome to control my toad braking system. So I could tie into the brake light easy. And I had already installed some 12 volt accessories - hooked up to the coach battery below the dash, so I had a 20 amp circuit for the brake +12 power.

    At the back of my RV, years ago, I installed a power strip. So the green, yellow and brown wires where connected there, and I was able to quickly connect another wire to the new plug.

    Good luck,

    Fred.