Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-22-2012, 04:45 PM   #1
2 Rivet Member
 
THEMACS3's Avatar
 
1973 27' Overlander
Williamsburg , Virginia
Join Date: May 2012
Posts: 24
No brakes when battery is hooked up

Ok so here's the issue. When I connect the battery in my '73 over lander, I loose my brakes. Any iras?
__________________

__________________
THEMACS3 is offline   Reply With Quote
Old 05-22-2012, 05:15 PM   #2
Rivet Master
 
HowieE's Avatar
 
1991 34' Excella
Princeton , New Jersey
Join Date: Aug 2003
Posts: 6,813
Images: 12
The only connect to the brakes from the trailer battery is through the emergency disconnect switch. If the pin is pulled from that switch the brakes should be LOCKED.

Are you saying that connection the trailer battery cause you to lose the braking function from the TV controller when hooked up?

I can't see a wiring error that would account for this.
__________________

__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
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
Old 05-22-2012, 07:33 PM   #3
2 Rivet Member
 
THEMACS3's Avatar
 
1973 27' Overlander
Williamsburg , Virginia
Join Date: May 2012
Posts: 24
That's exactly what's happening. Once I connect the battery, the tv controller doesn't recognize that the trailer is connected and therefore no brakes.
__________________
THEMACS3 is offline   Reply With Quote
Old 05-22-2012, 07:36 PM   #4
2 Rivet Member
 
THEMACS3's Avatar
 
1973 27' Overlander
Williamsburg , Virginia
Join Date: May 2012
Posts: 24
I also trie disconnecting the emergency disconnect system and had the same results. New disconnect system didn't help the issue either. Could use any suggestions you might have
__________________
THEMACS3 is offline   Reply With Quote
Old 05-22-2012, 07:37 PM   #5
4 Rivet Member
 
Eric H's Avatar
 
1974 23' Safari
Vintage Kin Owner
1947 25' Spartan , Manor
Join Date: Sep 2011
Posts: 457
Images: 9
Is it just the brakes?
__________________
Eric H is offline   Reply With Quote
Old 05-22-2012, 07:46 PM   #6
2 Rivet Member
 
THEMACS3's Avatar
 
1973 27' Overlander
Williamsburg , Virginia
Join Date: May 2012
Posts: 24
Yes just the brakes
__________________
THEMACS3 is offline   Reply With Quote
Old 05-22-2012, 07:58 PM   #7
Rivet Master
 
68 TWind's Avatar
 
1968 24' Tradewind
Oxford, , Mississippi
Join Date: May 2009
Posts: 1,420
Check your grounds.
__________________
__________________
Bruce & Rachel
__________________
68 Trade Wind
2001 Toyota Tundra
68 TWind is offline   Reply With Quote
Old 05-22-2012, 09:25 PM   #8
Rivet Master
 
TG Twinkie's Avatar
 
1974 Argosy 26
Morrill , Nebraska
Join Date: Nov 2009
Posts: 5,140
Images: 2
Blog Entries: 5
I would check the UCord wiring out completely as well as the breakaway switch wiring along with the wiring at the brake drums.
The only way that connecting the house battery would and should affect the brake operation is when the pin in the breakaway switch is pulled. When this happens the trailer brakes should be energized.
__________________
Knowledge: "A gift to be shared. A treasure to receive."
TG Twinkie is offline   Reply With Quote
Old 05-22-2012, 09:58 PM   #9
Rivet Master
 
HowieE's Avatar
 
1991 34' Excella
Princeton , New Jersey
Join Date: Aug 2003
Posts: 6,813
Images: 12
Did this combination of TV and trailer ever work together?

Some of the newer controllers have a constant small current from the controller to the trailer to show proof of connection. While I can say for sure what might happen if the trailer battery were to back feed that circuit. I would suggest that you prove out both the TV and Trailer connections. Use this diagram as a guide.

Electrical Tips

Checking the TV is straight forward by just using a volt meter and selection the different functions. If you insert a #12 wire in the terminal located at 1 o clock on the trailer cord you should be able to test the directional lights at 3 and 9 o clock and the parking lights at 11 O clock put touching the test wire at these locations. If these test OK touch the wire to 4 o clock. That should be the brakes and someone standing next to the trailer should hear them click on and off.

I say a #12 wire because when you test the brake circuit you will be drawing 3.5 amps per brake and a smaller wire will melt in you hands.

Let us know the results.
__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
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
Old 05-23-2012, 03:35 AM   #10
2 Rivet Member
 
THEMACS3's Avatar
 
1973 27' Overlander
Williamsburg , Virginia
Join Date: May 2012
Posts: 24
I did test the tv controller and harness out, they are working properly. What is the UCord?
__________________
THEMACS3 is offline   Reply With Quote
Old 05-23-2012, 06:22 AM   #11
Well Preserved

 
1993 21' Sovereign
Colfax , North Carolina
Join Date: Jun 2003
Posts: 20,193
Has the trailer and tow vehicle always had this problem?
Has the trailer always done this or is it a new development?
Do the trailer brakes work with any other tow vehicle?
__________________
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
overlander63 is offline   Reply With Quote
Old 05-23-2012, 06:50 AM   #12
Rivet Master
 
TG Twinkie's Avatar
 
1974 Argosy 26
Morrill , Nebraska
Join Date: Nov 2009
Posts: 5,140
Images: 2
Blog Entries: 5
The UCord is the same as the harness that connects the trailer to the TV.
Do all of the lights work the way they should on the trailer exterior? Tail lights, turn signals etc.
__________________
Knowledge: "A gift to be shared. A treasure to receive."
TG Twinkie is offline   Reply With Quote
Old 05-23-2012, 07:27 AM   #13
Rivet Master
 
AirsDream's Avatar
 
1999 23' Safari
Perrysburg , Ann Arbor
Join Date: Sep 2005
Posts: 914
Is it possible the the trailer battery is reversed ... or just the braking circuit ... polarity backwards? I've never thought this through, but it seems to me that other circuits, such as the lights, etc. would not care positvie ground vs. negative ground - they likely would work either way, and likely would not interact with the t.v. battery in the same way as the braking circuit. (Vent fans might run backwards, though, I suppose.) This is an odd one.
__________________
AirsDream is offline   Reply With Quote
Old 05-23-2012, 08:01 AM   #14
Rivet Master
 
TG Twinkie's Avatar
 
1974 Argosy 26
Morrill , Nebraska
Join Date: Nov 2009
Posts: 5,140
Images: 2
Blog Entries: 5
If the trailer has a converter, you would know if the battery were reversed. The TV wouldn't like it either.
Have you checked to see if one or more of the brake coils is shorted to ground?
__________________

__________________
Knowledge: "A gift to be shared. A treasure to receive."
TG Twinkie is offline   Reply With Quote
Reply


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



Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:21 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

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