Home » Public Forums » GMCnet » [GMCnet] Restoration. Factory trailer wiring harness. You may have one. Better then off rear lights.
| [GMCnet] Restoration. Factory trailer wiring harness. You may have one. Better then off rear lights. [message #297698] |
Sun, 20 March 2016 01:47  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
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Old awning came off today. New holding tanks getting secured now. Inside plastic restoration completed. Then I notice a really bad trailer wiring job to the tail lights. Looked in the glove box to see if a trailer wiring harness came from the factory. And there it was. RPO# UPA-801 Trailer Wiring Harness. So I went out to see where it came out of the body on the GMC convertible. There it was. At the lower left corner of the body. So then I went in, to pull out the mouse house harness. Never used. The wires are wrapped. About 5 ft long. Attached to the rear frame rail across the back with metal clips holding it in place. There are 5 wires. Yellow, Green, Brown, Blue, and a larger white wire. One each for Left, Right, Run lights, and the larger white for ground. So what's the extra wire? Have to be brakes, or 12 Volt. If the 5th wire is for brakes. Where is it up front to hook up to the controller?Bob Dunahugh78 Royale. Mouse House
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| Re: [GMCnet] Restoration. Factory trailer wiring harness. You may have one. Better then off rear lights. [message #297708 is a reply to message #297698] |
Sun, 20 March 2016 07:49  |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
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Or maybe not-
Check back by the back corner where it enters the coach. Mine stopped there on the 1977.
Dolph Santorine
DE N8JPC
Wheeling, West Virginia
1977 ex-Palm Beach TZE167V100820
1-ton, Sullybuilt Bags, Reaction Arms, 3.70 LSD, Manny Transmission, EV-6010,
> On Mar 20, 2016, at 2:47 AM, Bob Dunahugh wrote:
>
> Old awning came off today. New holding tanks getting secured now. Inside plastic restoration completed. Then I notice a really bad trailer wiring job to the tail lights. Looked in the glove box to see if a trailer wiring harness came from the factory. And there it was. RPO# UPA-801 Trailer Wiring Harness. So I went out to see where it came out of the body on the GMC convertible. There it was. At the lower left corner of the body. So then I went in, to pull out the mouse house harness. Never used. The wires are wrapped. About 5 ft long. Attached to the rear frame rail across the back with metal clips holding it in place. There are 5 wires. Yellow, Green, Brown, Blue, and a larger white wire. One each for Left, Right, Run lights, and the larger white for ground. So what's the extra wire? Have to be brakes, or 12 Volt. If the 5th wire is for brakes. Where is it up front to hook up to the controller?Bob Dunahugh78 Royale. Mouse House
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| Re: [GMCnet] Restoration. Factory trailer wiring harness. You may have one. Better then off rear lights. [message #297725 is a reply to message #297698] |
Sun, 20 March 2016 12:19 |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
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.A PO probable cut it off. As they didn't know what it was. Both GMC's had the same amount of wire. Bob Dunahugh
From: yenko108@hotmail.com
To: gmclist@list.gmcnet.org
Subject: Restoration. Factory trailer wiring harness. You may have one. Better then off rear lights.
Date: Sun, 20 Mar 2016 01:47:45 -0500
Old awning came off today. New holding tanks getting secured now. Inside plastic restoration completed. Then I notice a really bad trailer wiring job to the tail lights. Looked in the glove box to see if a trailer wiring harness came from the factory. And there it was. RPO# UPA-801 Trailer Wiring Harness. So I went out to see where it came out of the body on the GMC convertible. There it was. At the lower left corner of the body. So then I went in, to pull out the mouse house harness. Never used. The wires are wrapped. About 5 ft long. Attached to the rear frame rail across the back with metal clips holding it in place. There are 5 wires. Yellow, Green, Brown, Blue, and a larger white wire. One each for Left, Right, Run lights, and the larger white for ground. So what's the extra wire? Have to be brakes, or 12 Volt. If the 5th wire is for brakes. Where is it up front to hook up to the controller?Bob Dunahugh78 Royale. Mouse House
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| Re: [GMCnet] Restoration. Factory trailer wiring harness. You may have one. Better then off rear lights. [message #297812 is a reply to message #297698] |
Tue, 22 March 2016 00:39 |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
Karma: 11
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Found the other end of that extra blue wire in the factory trailer harness. It goes from the outside end of the harness. To just inside of the body below the left tail light. Thought of using it for the electric brakes. But if I'm going to run a wire from the front to the back of the body. What's another 4 ft. But if you wanted 12V in your trailer. Great wirer to use.Bob Dunahugh
From: yenko108@hotmail.com
To: gmclist@list.gmcnet.org
Subject: Restoration. Factory trailer wiring harness. You may have one. Better then off rear lights.
Date: Sun, 20 Mar 2016 01:47:45 -0500
Old awning came off today. New holding tanks getting secured now. Inside plastic restoration completed. Then I notice a really bad trailer wiring job to the tail lights. Looked in the glove box to see if a trailer wiring harness came from the factory. And there it was. RPO# UPA-801 Trailer Wiring Harness. So I went out to see where it came out of the body on the GMC convertible. There it was. At the lower left corner of the body. So then I went in, to pull out the mouse house harness. Never used. The wires are wrapped. About 5 ft long. Attached to the rear frame rail across the back with metal clips holding it in place. There are 5 wires. Yellow, Green, Brown, Blue, and a larger white wire. One each for Left, Right, Run lights, and the larger white for ground. So what's the extra wire? Have to be brakes, or 12 Volt. If the 5th wire is for brakes. Where is it up front to hook up to the controller?Bob Dunahugh78 Royale. Mouse House
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