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Old 03-12-2008, 09:13 PM
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can't wire trailer lights

I'm trying to wire trailer lights up and my pigtail is wired up to factory wires typical 4 plug (white-ground brown-taillights yellow-left blinker green-right blinker) problem is on 2000 S10 2.2 with lights on mash brakes and every thing goes out with brakes mashed is it a ground short or lights ground
please help maybe running lights is problem for this plug

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Old 03-12-2008, 09:20 PM
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check your grounds,They will do crazy things.
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Old 03-12-2008, 09:33 PM
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Use another wire or even jumper cables and establish a good ground between vehicle and trailer, you will probably be amazed.
I watched a bunch one time at a bluegrass festival, trying to get their camping trailer lights working, after about an hour I walked over and asked what was their problem, they explained they couldn't get anything to work right, I said make sure you got a good ground between truck & trailer, dude said he knew what he was doing, so I walk back over to our camper and have me another cold one.
Feeling sorrow for the dude, I walked back over and picked up a lenght of wire and pressed it against his bumper and a shiny bolt head on his trailer and bingo his lights started working, I just dropped the wire and walked off, didn't want to tell him I also found the same thing out the hard way.


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Originally Posted by alabamasho
I'm trying to wire trailer lights up and my pigtail is wired up to factory wires typical 4 plug (white-ground brown-taillights yellow-left blinker green-right blinker) problem is on 2000 S10 2.2 with lights on mash brakes and every thing goes out with brakes mashed is it a ground short or lights ground
please help maybe running lights is problem for this plug
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Old 03-12-2008, 09:58 PM
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I worked on boat trailers for over 25 years and both answers are dead on.
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Old 03-12-2008, 10:22 PM
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Ah hell, grounds ain't that important, are they?
Listen to these guys, they know what they're talking about.
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Old 03-12-2008, 11:27 PM
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Cars get interesting when your CD player goes off every time your wipers are turned on. (Or the car dies each time you turn left while the wipers are on).

Drive a 5 ft ground rod by the trailer. Run a 8 ga. wire from trailer to rod clamp. Do the same for the vehicle hitched to the trailer. Show off your working lights, but never move the vehicle or trailer.

Advice given to me by an old fart when I was a teenager working part-time in his shop: "If it starts acting weird, check the grounds." Worked often enough I haven't forgotten it.
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Old 03-13-2008, 06:29 PM
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trailer lights

you guys are battin 10/10 , its my son truck and boat trailer (he's 19 yo)I diagnosed it from the couch, went out there and fooled with it for 1/2 hour knew grounds wern't right so to save alot of hassle just forum to guys that know and waa-laa! lights work used jumper cables and stuck ground rod in the ground with wires hooked to it. I told him to pull swimmin pool over close and fish in it so he wouldn't cause traffic jam thanks again
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Old 03-13-2008, 08:13 PM
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Thank you for the laugh, I needed that after today's aggravations! I can just see him, feet propped up on the gunwale, sunblock on the nose, outboard pointed up, and a taut line to a wading pool! Yellow rubber duckies make good floats.
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