Prodigy says there is a short.

[Dave e Victoria]

We are configured with a Prodigy brake controller driving the brakes in our Cambridge. Recently I have noticed that in hard braking conditions I get normal behavior then, a warning followed by a short indication, After i get off the brakes, the short indication remains for a few moments and then clears. Thereafter the system behaves normally until I get to a hard brake situation again. The Cambridge is heavy enough that it is hard to tell if the braking is actually compromised.

Anybody out there have an idea about what is going on?

In point of fact, the brake wiring in the Cambridge is just as sloppy as has been reported for the rest of the electrics. I've had broken circuits on several occassions due to exposed and unsecured butt splices coming apart. But, I havn't seen anything that would cause a short although I have not been inside the frame above the bottom apron.

Dave

[noneck]

Hi Dave, Have you looked inside the brake drums? Might be something going on in there when the cam pulls more extremely on hard brake operations. Did you see this picture I've posted? The magnet wires were incorrectly routed, rubbed through insulation. Not to say this is your issue...but who knows.
Chuck
Incorrect Routing!!!!


Proper Routing! That magnet rattles so wire needs freedom to move around without wearing out the insulation.

[Okie Guy]

Dave,

I feel your pain brother. I have been searching for my brake short for overe 6 months. My brakes will work fine and then the short is indicated. It doesn't take long and the brakes will release and then grab several times. Let me know what you find out. If I find anything I will do likewise.
Phil

[JH Sechelt]

I had the same problem as Chuck, inside the drum. Right rear wheel.

J&D

[stiles watson]

According to the indication you give, there are only two places for it to occur. (1) Prodigy is malfuncioning or (2) there is really an intermittent short.

Since it is intermittent, I suspect (like the others) it is some place where there is wire movement under load. If I were trouble shooting, I would start with the drums and work back from there. Hope you find it sooner than later.

[Dano]

When we first got the monty last year, the back brakes were the only ones working, I took the belly down and found the wire just hanging there, never hooked up.

[Illini Trekker]

Chuck is on the right path. I've had three wire at three different wheels short out. My fix was undue the wires outside the hub slide shrink wrap over the wire. Then when making the connection outside the hub again solder the wires together. Hope your problem will be so easy to fix, let us know. SeeYa

[Dave e Victoria]

Chuck, Thanks for the picture. This is most likely the problem. I plan on servicing the coach in January and will look for this condition.
Also, I originally posted this under Montana and someone moved it to tow vehicles. It is mostlikely a Coach problem
Dave

[Cat320]

If all else fails, try calling Prodigy...they are very helpful: 888-785-5832.

[sreigle]

Dave, if you decide to pull a drum and check the wiring, I'd recommend pulling the right rear one first. Of all the shorted wires in the drums that have been reported here in the past year or two I only recall one that was not in the RR.

[noneck]

Except for me... I had shorts in all four of them because of the wiring mistake. This after pulling it home 5hrs from dealer. I did feel better knowing all were fixed up, rerouted like picture above (edited since original post, with second picture of proper routing) and while I was in there cleaned, inspected bearings, races, and repacked with fresh grease.
Chuck

[Bill Frisbee]

My "shorting brakes" problem was in the right rear, exactly as Steve predicted it would be. It appears that the "right rear wheel brake wiring old world craftsman" needs to go back to old world craftsman school!!!

Bill

[stiles watson]

Congrats on finding the problem. Resolution brings relief. Happy
RVing.......