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Old 11-05-2011, 10:17 AM   #1
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1969 27' Overlander
Albuquerque , New Mexico
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Original trailer plug wiring diagram?

I'm sure the CORRECT answer is already posted, but every thread I've read seems to have a different wiring diagram, so here goes:
I'm looking for the ORIGINAL Airstream wiring/pin-out, for the the trailer plug coupler that's built into the front of the trailer. Specifically, 1969, if there were different wiring schemes.
The Overlander has a removeable trailer plug (Made by Pollack), that I need to replace. I want to make sure that the pin-out configuration on the trailer end is factory correct. I know I can just rewire the trailer plug in the trailer to match what I need, but that's not the right way to do it.
I can figure out the TV trailer side, which of course is a 7 pin.
I know there was a "standard" configuration from Airstream, but I can't seem to locate it anywhere.
Any help would be greatly appreciated!
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Old 11-05-2011, 11:52 AM   #2
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this works for me:
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Old 11-05-2011, 01:43 PM   #3
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1971 25' Tradewind
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Try this from the 70s:
center is blue /charging line
1 o'clock is right turn (red)
4 o'clock is brakes (yellow)
6 o'clock is left turn (black)
8 oclock is ground (white)
10 o'clock is back up (brown)
11 oclock is running lights (green)

Keep in mind this configuration will not match up with new RV standard wiring.
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Old 11-05-2011, 06:10 PM   #4
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This is how mine is wired.



I didn't care how my trailer was wired. My goal was to wire the trailer to accept a standard 7-way tow vehicle plug. I mapped the trailer with a small battery charger, a multi-meter, and a 12 volt jumper light. Then I used a 7-way tester to wire the trailer plug, and the same tester to wire the umbilical removable end.

I have three other trailers with 7-way plugs and two tow vehicles. All four trailers work with either tow vehicle and any other standard 7-way tow vehicle.

I used the diagram to build a new fuse panel and to wire the breakaway switch. The trailer wires didn't all match the service manual diagram, the umbilical wire colors didn't match the plug color codes, but . . . everything matched the 7-way tester . . . and wired to the tester, everything worked.
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Old 11-05-2011, 07:35 PM   #5
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Splitrock's US diagram is the same as my configuration, but turned 180 degrees.
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Old 11-05-2011, 08:04 PM   #6
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Quote:
Originally Posted by Lumatic View Post
Splitrock's US diagram is the same as my configuration, but turned 180 degrees.
Huh?


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Old 11-05-2011, 08:23 PM   #7
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Splitrock's US diagram above is the same configuration I described with the plug turned 180 degrees. It's the same plug from a different viewpoint.
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Old 11-05-2011, 08:52 PM   #8
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Quote:
Originally Posted by Lumatic View Post
Splitrock's US diagram above is the same configuration I described with the plug turned 180 degrees. It's the same plug from a different viewpoint.

Sorry, I don't understand. My 7-way plugs and cords have an aligning notch. My plugs and the cord accept a standard 7-way tester to configure to and to test to.
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Old 11-05-2011, 09:14 PM   #9
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Quote:
Originally Posted by Splitrock View Post
Sorry, I don't understand. My 7-way plugs and cords have an aligning notch. My plugs and the cord accept a standard 7-way tester to configure to and to test to.
Simply put, it's the same plug.
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Old 11-05-2011, 09:21 PM   #10
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Here's another view from my '72 repair manual.
I needed to replace mine as the pins were falling out. I don't remember if the direct fit replacement came from ODM or Vintage Trailer. Everything went back together without problems. I fitted new heat sealing ring terminals to the wire ends as some of the originals were corroded.

Hope this helps,
Tom
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File Type: pdf back of 7 pin plug.pdf (163.9 KB, 562 views)
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Old 11-05-2011, 11:35 PM   #11
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Thanks to everyone for the information!
From what I can tell, the wiring diagram that Tom provided appears to very closley match what I have, looking at the backside of the plug.
The circuit breaker, and ground connections attached to the mounting bolts are exactly what I observed on my Overlander. The pin-out seems to be the same, too. I'll verify tomorrow.
Thanks again.
EDG
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Old 11-06-2011, 08:51 AM   #12
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Hard to say what changes have been made but this pic might help. Click to make it big...
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