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04-20-2018, 08:20 AM
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#1
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1 Rivet Member
1983 31' Excella
Holden
, Massachusetts
Join Date: May 2017
Posts: 13
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Brake wiring diagram
When we bought our 1983 excella the wires to the brakes were broken. No big deal, mechanic for 40 years, but when I repaired them the brakes locked as soon as I plugged into the truck. I found that the previous owner had replaced the trailer harness with no regard for color code. So I am looking for the wiring diagram. The lights are easy but need to figure out brake and main power.
Thanks
Jon
PS
Does anyone have a copy of the airstream service manual ? Apparently the 80s are an issue to find
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04-20-2018, 10:12 AM
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#2
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Rivet Master
2002 30' Classic S/O
Fleming Island
, Florida
Join Date: Nov 2013
Posts: 4,673
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Wiring varied over the years. Examples:
https://www.ajtnt.com/7-way-rv-plug-diagram/
and
https://www.etrailer.com/question-136117.html
Note that the color codes and pin positions are different between these two sources.
Best bet is to use a meter or test light to confirms what is coming from the truck and wire the trailer accordingly. The only truly common thing I am aware of is Blue is for brakes.
Al
__________________
“You cannot reason someone out of a position they have not been reasoned into"
Al, K5TAN and Missy, N4RGO WBCCI 1322
2002 Classic 30 Slideout -S/OS #004
2013 Dodge 2500 Laramie 4x4 Megacab Cummins
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04-20-2018, 11:01 AM
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#3
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Rivet Master
2007 30' Classic
KW
, Ontario
Join Date: May 2012
Posts: 998
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Quote:
Originally Posted by Oldwrench
When we bought our 1983 excella the wires to the brakes were broken. No big deal, mechanic for 40 years, but when I repaired them the brakes locked as soon as I plugged into the truck. I found that the previous owner had replaced the trailer harness with no regard for color code. So I am looking for the wiring diagram. The lights are easy but need to figure out brake and main power.
Thanks
Jon
PS
Does anyone have a copy of the airstream service manual ? Apparently the 80s are an issue to find
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I made this diagram when I had issues with my 2007.
http://www.airforums.com/forums/f37/...ng-137679.html
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04-20-2018, 11:17 AM
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#4
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1 Rivet Member
1983 31' Excella
Holden
, Massachusetts
Join Date: May 2017
Posts: 13
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Thanks for the response but actually tow harnesses are standard brown is running, green and yellow are brake and turn, lt green is back up, blue is electric brake, red is tow vehicle power, and white is ground. What I am trying to figure out is where in the fuse box do the electric brake and tow vehicle power connect.
Thanks
Jon
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04-20-2018, 11:28 AM
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#5
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Rivet Master
2002 30' Classic S/O
Fleming Island
, Florida
Join Date: Nov 2013
Posts: 4,673
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Tow vehicle power connects to the positive bussbar. Your choice which side of the disconnect switch. Blue brake wire from the TT, at least in my trailer, is not in the fuse box, but in a Barqman black plastic junction box near the fuse panel.
If you are talking about the power to the breakaway switch, it is often connected direct to the battery through an inline fuse, but sometimes connected to a fuse in the fuse panel.
On the other hand, the 1983 Airstream TT manual shows the 7-way connected in the fuse box. See page U-6.
https://www.airstream.com/service/ma...ear_select=879
Al
__________________
“You cannot reason someone out of a position they have not been reasoned into"
Al, K5TAN and Missy, N4RGO WBCCI 1322
2002 Classic 30 Slideout -S/OS #004
2013 Dodge 2500 Laramie 4x4 Megacab Cummins
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04-20-2018, 02:09 PM
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#6
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Rivet Master
1991 34' Excella
Princeton
, New Jersey
Join Date: Aug 2003
Posts: 7,070
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First check your TV to be sure brakes are connected to terminal #2. Test with a meter while someone applies the brakes. If that checks out OK. Then apply trailer battery power to terminal#2 on the trailer and the brakes should come on.
If the brakes are coming on while there is no signal from the TV brake controller and the TV is connected you have a wiring problem in the connector or the trailer.
Trailer brakes go directly from the umbilical cord to the brakes without any fuse or other connection in the trailer.
The wires in the umbilical cord and the TV connector are very closely together and often cross connect to one another. Open the connectors and inspect. I like to solder these wires to improve the connection and prevent shorts from movement.
__________________
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
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