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Old 09-07-2006, 12:26 AM   #1
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60's 12vdc electrical panel

OK, I'm still trying to figure out this crazy panel. I'm getting closer.

On the front of my trailer are two plugs as show in the photo. One is a modern 7-way and other other is a 4-way plug. The 7-way works for all the lights and the brakes etc... I did not know what the 4-way did so I pulled the front of the belly pan back to see. It has the top two #10 wires tied together and the bottom two tied together. The top set runs into the trailer near the fuse panel and is tied to the wall (grounded). The bottom set is tied together to one #10 lead and runs inside the trailer and comes out at the fuse panel shown.

A the fuse panel I've identified the above wires as well as the original battery feed from the front battery box, and the wire the powers all the lights and fans in the trailer. Everything is on one circuit.

The odd thing is that the +12v wire on the 7-way plug does not show up inside the trailer where I need it if I locate a battery inside. My current plan is to use the wire coming from the unused 4 way plug since its #10 and appears to have no other purpose. I can make the changes behind the panel while I have it down.

Back to the fuse panel.... There are only two wires on the right that come out of the wall that I have no idea what they are for. Any ideas?
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Old 09-07-2006, 01:02 AM   #2
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1960 24' Tradewind
santa barbara , California
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Tim ,

mine is the same ,I use the same setup now ,both plugs .The larger is for the
trailer brakes ,lights, brake /turn signals.The other is for the 12volt power
and ground wires ,ground from tv frame to trailer ,the 12volt wire from tv charging to trailer spliced with 10 gauge wire to battery in front box .the 12volt lead is in the 4 pin connector at
trailer silver and brass pins are both 12volt (the spliced wires)As you noted,the top pins are grounds (4 pin connector)The secondary plug from trailer wire is the 12volt source from 4 pin connector ,from tv (not at the large connector 7 way) inside wire used from the 4 way plug yes ! that wire
connects the 12 volt tv charge to the battery.The inside wire to the far right
is for the grover 12volt air pump (switched from the wall switch above by front window)the black with red twist connector on it.the one next to it goes up to the wall switch also, 12 volt .Both in one wall grommet at right .

Scott
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Old 09-07-2006, 01:16 AM   #3
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Ah cool. That explains it then.

I was thinking of the pump, which is missing in my trailer, but I thought it would just be wired to the fuse panel and not run in the wall. Never gave any thought to a switch for it.... doh!

Good info! I might reuse that switch setup for my Shurflo!

Now I'll have to go out and look for that switch!
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Old 01-07-2007, 09:44 PM   #4
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I was finally able to replace the original fuse box today. Of course there was a lot of work in the background to get to this point.

Attached is an image of the new fuse block. The upper left is the charge line input from the TV, and also the supply for the break away switch and the future power jack.

The second down on the left is the original lead that powers all the original 12v stuff in the trailer. The fans, lights, etc.

The lower left is unused for now, it runs up to the original battery box on the front of the trailer. The two leads on the left go to the switch for the water pump. I just put them on the block for convenince until I use them.

So the before photo is the second picture on post 1.

Nice, to have 12vdc back in the trailer!
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1960 International Ambassador 28'
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Old 01-11-2007, 09:13 PM   #5
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1960 24' Tradewind
santa barbara , California
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Tim ,looks alot better there .The PO of my trailer had many new glass fuses
in the parts box drawer ,so no problem with fuses .I like the glass fuse
panel anyway and its original ,so thats cool .One thing that would be nice
would be grounded outlets ,3 prong .many of my vintage appliances have
the (either way plug in ) .I should just replace the plugs with polarity specific
large/small blades ,but the outlets need to be upgraded to go along with them.Well ,its all been good though ,no troubles to speak of .

Scott
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Old 01-11-2007, 09:30 PM   #6
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I upgraded all of my outlets to three prong with my electrical update.

When I put in the new electrical panel, I ran a ground wire to a rib. Then I replaced all the outlets with grounded frames so that when they are mounted in the alumium wall they were grounded.

Each cut out in the wall had to be enlarged for the newer outlets.
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