electrical gremlins! - Fiberglass RV


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Old 12-07-2012, 04:56 PM   #1
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electrical gremlins!

I 'love' when this happens. Did some work on the trailer today-adding an outside electrical outlet-of course my left over romex was about 2' short(thougt I had measured correctly. So, another trim to the store for a longer piece.

Then hooked up the trailer to test the trailer running lights as I might be heading out next week. Blinkers worked on the marker lights, no taillights!

I have both a 7 wire and a 4 wire pigtail(just in case). The 7 wire didn't work right, the 4 wire worked perfectly(now they are both connected to the same wiring block). Pulled the 7 wire connector apart and checked all the wires-no shorts, no loose wires, everything in the right place. Put it back together and plugged it in-EVERYTHING WORKED FINE!

Well, I got to make sure all connections were good anyway.
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Old 12-07-2012, 05:04 PM   #2
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That stuff usually happens when you loaded and ready to go. Dirty contact. Loose wire. I'm sure you know the drill. Raz
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Old 12-07-2012, 05:33 PM   #3
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I keep one of those LED trailer plug testers in my spares box for such occasions, That way I can rule out the vehicle wiring in a single test. Of course, if you have one you will never need it, if you don't have one you will wish you had gotten one. It's the nature of the beast
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Old 12-08-2012, 09:48 AM   #4
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Me, Measured wire and cut short all 3 times.
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Old 12-08-2012, 10:18 AM   #5
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Smile electrical problems

Quote:
Originally Posted by Dennis Clinton View Post
I 'love' when this happens. Did some work on the trailer today-adding an outside electrical outlet-of course my left over romex was about 2' short(thougt I had measured correctly. So, another trim to the store for a longer piece.

Then hooked up the trailer to test the trailer running lights as I might be heading out next week. Blinkers worked on the marker lights, no taillights!

I have both a 7 wire and a 4 wire pigtail(just in case). The 7 wire didn't work right, the 4 wire worked perfectly(now they are both connected to the same wiring block). Pulled the 7 wire connector apart and checked all the wires-no shorts, no loose wires, everything in the right place. Put it back together and plugged it in-EVERYTHING WORKED FINE!

Well, I got to make sure all connections were good anyway.

The use of "electrical grease" will help eliminate corrosion and help make contacts better, because of conductivity of the grease.

Later Kenny
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Old 12-08-2012, 10:19 AM   #6
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Me, Measured wire and cut short all 3 times.
Same here only it's usually lumber.
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Old 12-09-2012, 10:55 AM   #7
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Found my gremlin and it was me! Turns out the new TV socket will allow the 7 way plug to go in upside down. Another thing to add to the 'preflight' checklist.
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Old 12-09-2012, 11:13 AM   #8
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Found my gremlin and it was me! Turns out the new TV socket will allow the 7 way plug to go in upside down. Another thing to add to the 'preflight' checklist.
I would suggest you check a couple fuses, the one in the battery box and the one under the front couch. One or both are probably blown. Some vehicles have a fuse between the battery and trailer connector in the charge line.

I did that and blew the fuse at the battery, just as we were leaving for 3 months. About a month later the charge line fuse in the tow vehicle went. Surprises on the road we can live without.
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Old 12-09-2012, 11:20 AM   #9
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Byron: I don't currently have a battery in the trailer(yet). And I have a switch in the TV to turn off the TV battery lead to the trailer. Thank goodness that switch was off when I put the plug in upside down. But thanks for your suggestion.
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Old 12-09-2012, 11:23 AM   #10
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Found my gremlin and it was me! Turns out the new TV socket will allow the 7 way plug to go in upside down. Another thing to add to the 'preflight' checklist.
Lessons Learned! Doncha hate that . The seven-way plug on my tug has a tab on the door... it "latches" the plug and keeps it tight and secure in the socket. I could also turn it upside down, but it wouldn't latch. Check the door on your tug's plug, maybe yours is the same?
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Old 12-09-2012, 11:31 AM   #11
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Lessons Learned! Doncha hate that . The seven-way plug on my tug has a tab on the door... it "latches" the plug and keeps it tight and secure in the socket. I could also turn it upside down, but it wouldn't latch. Check the door on your tug's plug, maybe yours is the same?
I mark all my round plugs with a yellow paint pen so alignment is easy. Looks a little ugly, but sure saves frustration when I'm in a hurry.
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Old 12-09-2012, 11:43 AM   #12
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The problem with putting trailer pug upside down is it connects the + of the tow to the - of the trailer and the + of the trailer to the - of the tow. Poor connection configuration design if you ask me.

If do turn the plug upside down you will blow a fuse or two unless the charge line is NOT hot. By the time you determine that latch on the outlet isn't latching it's too late.

Tom has the right idea. I've been meaning to do that, but that darn ole roundtuit is a bit elusive at times.
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Old 12-09-2012, 01:06 PM   #13
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Are you guys using a different 7 way plug??? The one I use has a large square lug so it can only be plugged in one way.

Jason
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Old 12-09-2012, 01:30 PM   #14
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Are you guys using a different 7 way plug??? The one I use has a large square lug so it can only be plugged in one way.

Jason
Some plugs have a smaller "square lug" and in my case I drug it when I move the trailer without plugging it in and ground off part of the lug making it easier to plug in wrong.
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