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Old 07-15-2016, 01:53 PM   #1
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1977 31' Sovereign
Tallmadge , Ohio
Join Date: Jul 2016
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Bringing Home the Wagon

We have just purchased our 1977 Sovereign 31 Center Bath to do a full renovation. Our first task is to get it safely home from Clarksburg, WV to Tallmadge, OH (about 215 miles). The trailer was lived in and used as an extension to a home for 10 years by the PO who passed away and left it to the gentlemen I have purchased it from.

A few things that I'm planning to do are these:

1. Replace Tires/Wheels with ST225/75R15's since the current ones have been sitting for so long. I'm replacing the wheels since that just makes it easier, since we're trying to do a 1 day (Sunday) move and it was too difficult to arrange to have them mounted, balanced, etc.

2. Repack the bearings - who knows when they were done last. I don't need to lose a wheel on the trip home.

3. Check condition of brakes, etc., while I'm in there.

4. Get signals connected to TV.

This last part I need some assistance with. One key element that has not been located is the umbilical/pigtail cord to connect to the TV. So, I need to replace this. The trailer, of course, has the 7-pin connector (for which I have the pin-out). The TV has the 7-blade connector.

What parts do I need to create this cable or would there be one already available for purchase that I haven't found?

Is there anything else I should check out before the trip home?

Thanks!!!
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Old 07-15-2016, 02:12 PM   #2
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You might find what you need here.
http://odmrv.com/catalog/index.php?m...index&cPath=74
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Old 07-15-2016, 02:23 PM   #3
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I just replaced mine. The wiring is a little wonky because the 7 pin standard is not the same now as it was in the 70s. You can see my how-to here http://www.thegreatleys.com/journal/...al-replacement
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Old 07-18-2016, 08:50 AM   #4
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1977 31' Sovereign
Tallmadge , Ohio
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Thanks!

Thanks for the help, especially The Greatleys! I'll pick up the umbilical and the trailer connector and your wiring pictures should make it work.
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Old 07-18-2016, 09:16 AM   #5
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2005 30' Classic
1986 31' Sovereign
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Purdy,

I have a temporary bar I used for my recovery. It has a long umbilical, and LED lights. It's basically ready to go.

You are welcome to borrow it if you want to make the drive to Lorain.

Good luck on your voyage!
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Old 07-18-2016, 01:43 PM   #6
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I'd go with the temporary light bar per DanB personally. I spent over an hour trial and erroring crossing wires, etc. (I did end up toasting at least one circuit breaker in my TV) and it was still not right but was able to get turn signals & brake lights working properly which is all I needed since it was a day-time tow. I'd personally make sure you have the ability to have trailer brakes and also that the break away cable is connected and - to the extent you can - working. The 31' trailer will add the need for braking significantly. If you have not towed a trailer before, no big deal, but maybe find a parking lot to test out braking & stopping, turning, and backing up.
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Old 07-18-2016, 03:10 PM   #7
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1977 31' Sovereign
Tallmadge , Ohio
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Hmmmm. The temporary light bar is a tempting option. I was looking into them and didn't want to put out the money for the, hopefully, only time I would need it. The truck I will be using is all set up to control the trailer brakes, provided the trailer brakes are in working condition. I'm also letting my seasoned truck driver friend do the towing, rather than making a 200 mile first-time. :-)
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Old 07-18-2016, 07:28 PM   #8
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Remember:
A temporary light bar does not normally have any wiring to activate the brakes. You would need to add something.
A 3,000 lb trailer is illegal to tow without brakes.
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Old 07-18-2016, 08:05 PM   #9
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1978 Argosy Minuet 6.7 Metre
1989 29' Excella
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DanB is a seasoned tow master and Lorain is a short trip. Give him a ping and go! We are just south of him in LaGrange, and Larry is a good resource here. We would love to meet you too. Lou
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Old 07-18-2016, 08:14 PM   #10
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Larry has a set of 5 wheels and tires mounted that you are welcome to borrow. He would not hesitate to put a 500 mi. trip on them. You can borrow them for the trip. You can pm us if you want. Lou
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Old 07-18-2016, 11:50 PM   #11
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1977 Argosy 28
Euless , Texas
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Sovereign 12v wiring diagram

The umbilical/pigtail cord can be bought at some RV supply stores, auto supplies, and trailer stores. The 1977 Sovereign 31' center bath wiring diagram shows the pigtail attaching to the inside front wall on the drivers side. My 77 Argosy attaches to a 7 fuse block on the drivers front corner under the gaucho sofa and the pigtail wiring diagram also shows a fuse block on the 77 Airstream.

Attached is a pdf of the basic 12v wiring diagram and a jpg of the original pigtail wiring. You can find modern pigtail wiring diagrams online and rewire accordingly.
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Old 07-18-2016, 11:54 PM   #12
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1977 31' center bath wiring diagram

The PDF wiring diagram did not work so here is a jpg screen shot.
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Old 07-19-2016, 07:30 AM   #13
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1977 31' Sovereign
Tallmadge , Ohio
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Thanks!

You are all so helpful! As for wheels and tires, I already bought a set, so I'm covered there. For the wiring, I have all of the necessary wiring diagrams. I ordered a new 7-blade pigtail and a 7 pin connector. So, as long as the wires are good internally, I should be good. I'm just praying the trailer brakes are functional.

I would take the drive up to Lorain/LaGrange, but I don't have the time to do it this week and we're doing the big tow Sunday morning. I'm sure that as we go through our renovation, that we will be able to use advice and help and I'll definitely contact you locals!
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Old 07-21-2016, 02:26 PM   #14
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1977 31' Sovereign
Tallmadge , Ohio
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7-way connections

Greatleys,

Your diagram and chart have helped a lot. I bought the VTS Standard cable and have connected it as you documented. There are only a few concerns.

1. The wire you marked as ORG is actually RED. Their diagram shows the color orange, but labels it red. Go figure. No big deal there as I verified everything and I'm fairly confident in that one

2. Despite all documentation, there is no PURPLE wire. There is a BLACK one. As long as those are synonymous, I'm fine.

3. My main concern is that the docs claim that the WHITE (GND), BLUE (BRAKE), and RED (BATTERY) wires are 12 gauge and the rest are 16. On my cable, though the 12 gauge wires are WHITE (GND) and BLACK/PURPLE (BACKUP). That seems bizarre to me. I would expect the heavier cables to be GND, BATTERY, and BRAKE. It looks like I will have to verify this one! GRR!!!!
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Old 07-21-2016, 03:00 PM   #15
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1977 31' Sovereign
Tallmadge , Ohio
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Trying again

Doing a little more research, I found that my cable is a Hoffman. Following the diagrams from Hoffman and from Airstream, everything worked out the same as your cable. I think I'm confident now that I have it right. Is your cable a Hoffman as well?

Bottom line, as long as I verify with the TV that I have the power and ground correct, I shouldn't blow anything up and can check the rest by function. :-)
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Old 07-21-2016, 05:23 PM   #16
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Don't know who made my cable. I bought it at the local rv shop. But if there are two fat wires, those are definitely going to be the + and - (center and top). If you're not sure, call VTS. They're pretty good about customer service in my experience. Good luck with your move.
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Old 07-24-2016, 05:11 PM   #17
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1977 31' Sovereign
Tallmadge , Ohio
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The Purdy Wagon is home!

We made it safely home. The new wheels worked great. The bearings were in excellent condition. The brakes worked and enough of the lights worked as well.
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Old 07-24-2016, 06:05 PM   #18
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home safe

Glad to hear that you arrived at home safely. That was a fast trip. Glad everything went as planned. We hope that you will keep us posted on your progress on your new "baby".
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Old 07-24-2016, 09:20 PM   #19
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Congratulations on your safe trip. That's a nice looking Airstream. Looking forward to seeing what you do with it.
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