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Old 11-20-2016, 05:13 PM   #1
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1972 29' Ambassador
quitman , Georgia
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7 way plug inside 72 ambassador

Hopefully I'm asking in the right area. I've searched and unless I'm not saying it right I'm not coming up with much. We have a 72 ambassador 29' and the brakes do not work. Originally when we got it they would lock up with just a 7 pin plug with no controller. I unhooked the white wire from the inside of the A/S I now have a new truck with controller and can't for the life of me remember where the white wire goes. Can anyone help?
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Old 11-20-2016, 05:46 PM   #2
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1973 31' Sovereign
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On the trailer back then I think white was ground and yellow was brakes. It seems that you always need to set up your truck and trailer to match each other. There are a few standard color codes to chose from and your truck may be wired to one that is common for travel trailers but you will need to match wire to function for your trailer the first time.
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Old 11-20-2016, 07:10 PM   #3
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1969 31' Sovereign
Broken Arrow , Oklahoma
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All the info needed to connect.

https://www.etrailer.com/faq-wiring.aspx
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Old 11-20-2016, 07:24 PM   #4
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1972 25' Tradewind
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McHenry County , Illinois
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This is from the '72 service manual.
Hope it helps.

Tom
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Old 11-21-2016, 12:41 PM   #5
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I had 10 vintage airstreams in about 10 years and every single one was wired wrong so you just got to have trial and error and blue is usually the color for breaksome
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Old 11-21-2016, 01:57 PM   #6
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1972 29' Ambassador
quitman , Georgia
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Thank you guys for the replies. I guess I'll be out with a tester and trial and error
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