Question about 2005 Chevrolet Colorado

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Trying to wire lights for trailer on 2005 chevrolet colorado. 4 post harness on trailer. Due to two seperate brake and running lights on truck , I can get one or the other to work but not both. Suggestions?

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You will need a Converter Box, any parts store should have what you need.

Posted on May 14, 2010

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Hook up to my trailer , when i apply brakes my trailer lights flash


Most trailers use a single bulb system with the bright filament used for the brake and turn signal, and the dim one for running light. Your truck, however, has a separate bulb for brakes and turn signal, thus requiring the use of a logic box to operate the trailer lights. Get one from parts store, install and all should be good.

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I have a 2005 silverado, I am tring to wire a 4 wire trailer plug to this truck. I have 1 wire to right signal, 1 wire to left signal, 1 wire to running lights and a ground wire. My problem is on the truck...


Under the pan on the drivers side u can install the proper harnes for your trailer. The maim post for trailer brakes is on the front fuse panel under the hood.If you are running your own in line trailer lights...........I would start at the main break away dis-connect.

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you must check the connection where the truck harness meets the added trailer harness on the truck itself not the trailer harness.

Apr 04, 2010 | 2005 Chevrolet Colorado

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Parking lights on Nissan Frontier on - trailer parking not. 4 pin connector to factory connector (after market sealed wiring) - brake and turn signals work - no power to "brown" wire at factory connector...


First check the fuses. There may be one for trailer running lights. Check also power at the harness. If the brake lights and turn signals are seperate, there has to be a converter from 5 to 4 wire. For the power to feed back to the brake lights it sounds like the vehicle wiring is direct and not using a converter... or one of the bulbs on the trailer is contacting both contacts. Try http://www.etrailer.com/faq-wiring.aspx and maybe get a simple 4 pin tester that plugs into the 4 pin connecter. Hope this helps.

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I have brake lights,signal lights,flashers but i Dont have night lights on the trailer connected to my trailblazer.What's Wrong?


I have a new F150 I have hooked up to my horse trailer. Running light work but when I turn on a turn signal this blows the fuse to my running lights, any ideas?

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Right side trailer brake light does not work


Did yo check the fuse panel inside the truck its located on the drivers side dash , you have to open the driver side door, in there is a 10 amp fuse that is linked to rt trailer brakes and rt turn signal for the trailer, if the fuse is good there is a black box under the dash located on the floor on the driver side, just to the left of the break, thats where must of the plug in wire harness is for the trailer breaks!

May 31, 2009 | 2005 Chevrolet Silverado

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Have a 2005 chevy colorado, i installed a four way harness exactly how the directions say, but when i connect the trailor only the right and left turn signal and taillights work. No break lights.


On the truck, are the turn signals and the brake lights using the same bulb, if the brake lights are using a different bulb the trailer might not work withe the truck if it only has a 4 wire plug, might have to add brake lights to the trailer and use a 5 wire plug, yes this means rewiring the trailer and adding lights

May 15, 2009 | 2005 Chevrolet Colorado

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Identifying color coded wires for trailer hookup


get a cheap 12 volt test ($6 any parts store) light and have someone operate the different lights while u proble the wires, when the test light illuminates you tag that wire for what circuit was activated, brake, running, turn etc.

Mar 24, 2009 | 2005 Chevrolet Colorado

1 Answer

Hooked my 2007 Sprinter camping trailer to the factory lights/brakes hook-up located below bumper of my 2005 Silverado 4x4 extended cab truck. Everything works fine except for the right trailer turn...


Is this a 4 way or 6 way connection system? If your truck is wrong, then all factory equipped trailer package harnesses would be wrong, tell your trailer guy...I don't think so.
Is this the first trailer you have hauled?
Let me know, and we will go from there.
REgards,

Mar 10, 2009 | 2005 Chevrolet Silverado

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