Thread Tools Search this Thread Display Modes
Old 08-12-2012, 09:34 AM   #1
4 Rivet Member
ddruker's Avatar
2000 27' Safari
Palo Alto , California
Join Date: Apr 2012
Posts: 261
Images: 1
Intermittent Brake Short Solved

My prodigy controller started showing an intermittent brake circuit short message at the very end of a trip back from Yellowstone.

After reading here, I guessed the problem was that I had burned through a magnet.

I took the trailer in for service, and it turned out one of the magnets was severely worn and all of the brake shoes were cracked. I also had them repack the bearings at the same time, and they also replaced the leash on the breakaway switch.

I picked the trailer up and left for Yosemite. About 100 miles into the trip, the dreaded SH message showed up on the brake controller again. I took it easy and slow on the rest of the drive, and spent time going over the wiring inch by inch at the campsite.

I found that one of the leads to the breakaway switch was pinched under the aluminum propane tank cover. Over time, the insulation had worn away. Re-routing the wires so they were not pinched and about six inches of duct tape from the campsite host temporarily solved the problem. This week I will do a more permanent job.

So learning lesson is to make sure your breakaway switch wiring is not getting pinched underneath your tank cover... Seems like a design flaw that the wire routes that way where it can get pinched in the first place.

ddruker is offline   Reply With Quote
Old 08-12-2012, 10:46 AM   #2
Rivet Master
HowieE's Avatar
1991 34' Excella
Princeton , New Jersey
Join Date: Aug 2003
Posts: 6,899
Images: 12
There are 2 wires to the break away switch.

If the supply side is shorted it will blow the inline fuse coming from the batteries and most likely burn a hole in the bottom edge of the tank cover.

If the switched side is shorted it will ground the trailer brake system and any voltage sent to the brakes will be grounded out and thus NO BRAKES.
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles

HowieE is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 06:14 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.