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Farmall & IHC Tractors Discussion Forum
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trailer wiring

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scotc

10-15-2006 11:12:00




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I priced 12 ga stranded wire for rewiring my trailer It was 29 cents/foot most places. At Homo Despot they would cut it to length for 42 cents/foot. Or I could get it in a 500 foot spool for about 14 cents, or 14 ga for about 9 cents. I decided to get the 14 guage, spend an extra 20 bucks over the 12 guage so I could color code my power and ground, and that I would then have enough to run a circuit for each axle for the brakes. Lights are LEDs so no problem there, and I'd guess 14 guage will do for one axle, it looks like it used speaker wire before we got it. I would've color coded all my circuits but I didn't want to buy 2500 feet of wire to do it.

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scotc

10-17-2006 22:51:24




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 Re: trailer wiring in reply to scotc, 10-15-2006 11:12:00  
I'm going to code it with zip ties. each wire end pair will have a number of zip ties on it. Second axle wires? 2 zip ties, go to the front and find 2 zip ties, there's the other end of those 2 wires, and also put them on wherever there is an opening in the conduit. I'm going to run a circuit for each axle, which I figure shouldn't be any worse than one 12 guage circuit. I do have some 12 guage to tie them together and into the plug with. Each load will have a ground to the frame and a ground wire to the front of the trailer where they will be tied together and into the plug. What I got is UV, gas and oil resistant, stranded, just like what I've got at autozone. I'd tell you what I think of walmart but I don't want to get in trouble. I also haven't seen complete harnesses at the ones around home. I used to deliver to walmart. I've seen pallets of lunch meat sit out under the heaters for more than a half hour because the dockworkers didn't think it would warm up that fast. I get all I can afford to from giant eagle.

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old

10-15-2006 12:38:49




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 Re: trailer wiring in reply to scotc, 10-15-2006 11:12:00  
I always use the pre made stuff made just for wireing up trailors. That way I have the right color s for the job and down the road its easy to figure out what is what, but I do mess with a lot of trailors and I like to be able to fix it with out haveing to figure out which wire is which. The sets I buy have green, yellow, black, white, brown. Each color goes to a spot and when done it matches what factory trailor are wired then it can be used on all cars/trucks

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Tallperson

10-15-2006 11:57:54




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 Re: trailer wiring in reply to scotc, 10-15-2006 11:12:00  
I use either S-O cord(outdoor grade extension cord) or poly coated industrial grade wire. Never less than 12 gauge and 10 gauge for brake power and aux. 12 volt lines. I also run conduit where ever possible and put the wiring inside.... eliminates damage from rocks, mud build up , ice and brush etc.. Tallperson



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55 50

10-15-2006 11:49:07




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 Re: trailer wiring in reply to scotc, 10-15-2006 11:12:00  
I don't understand your statement "I decided to get the 14 gauge, spend an extra 20 bucks over the 12 gauge" ----- What do you mean by that?



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scotc

10-17-2006 22:32:26




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 Re: trailer wiring in reply to 55 50, 10-15-2006 11:49:07  
one roll of 12 ga: 71 bucks, 2 rolls of 14 ga: 90 bucks. One roll would do it but then I'd only have one color wire.



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KEB

10-15-2006 11:34:40




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 Re: trailer wiring in reply to scotc, 10-15-2006 11:12:00  
What kind of stranded wire are you using from Home Depot? If its the typical house type stranded with maybe 10 or 12 strands it'll work harden wherever it flexes and eventually break. Particularly a problem where it flexes when the axels move up & down & where it goes into the tow vehicle connector.

If you look at automative wiring, even the e-cheapo stuff Wally World carries, you'll notice its made up of a large number of fine strands. This is to help keep it from breaking where it flexes. Cables made up to flex, like welding cable, have even finer strands. I've used outdoor extension cords as a source of multi-conductor wiring for trailers, works well, flexes easily, is readily available, and cheaper than automotive wire.

Keith

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Jossette

10-15-2006 11:21:15




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 Re: trailer wiring in reply to scotc, 10-15-2006 11:12:00  
walmart sells the complete 30ft harness for $15



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