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Old 09-10-2006, 07:47 PM
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trailer wiring

just got an 07 silverado and it doesnt have a reciever hitch on it but I would like to put one on. GM sells the factory reciever and wiring harness for 200. how difficult would it be to hook up the wiring harness? is it a plug and play or do I need to go through the fuse box and everything. my other option is to buy a Curt hitch (cheaper) and find an aftermarket wiring harness. Any advice would be appreciated. thanks BF

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Old 09-10-2006, 08:10 PM
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I have never put on a factory harness but I rather imagine it is plug and play..it is not at all that difficult to wire for trailer lites..Are you going for the 4 prong simple deal or are you going to be runnig electric trailer brakes..?? Does Make a difference..

Sam
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Old 09-10-2006, 08:13 PM
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taillights and turn signals are all i will need and should be all thats on that factory harness right?
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Old 09-10-2006, 08:16 PM
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that is the basics..that should be on the factory harness..

Sam
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Old 09-10-2006, 08:47 PM
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i just checked and im almost positive thats it back there, theres a bundle of 7 or 8 wires with a cap on the end over what im gessing is going to be the plug and then theres a blue wire from the same bundle but with a separate cap on it. not sure what this one is. So now im wondering why would GM put a wiring harness on the hitch reciever they are selling if they are on trucks without one from the factory anyway. o well. thanks for your fast help, BF
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Old 09-13-2006, 08:36 PM
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It is different for each manufacturer, but most new trucks are factory wired for a seven wire trailer plug. However, if ordered without a tow package they may only have a four-wire connector, and no relays to activate trailer brakes or trailer accessories.

On my Ford Expedition I bought the seven-wire trailer connector as part of a kit and just plugged it into the wiring in the back. The kit also included additional fuses and relays that provided power to the seven wire plug.

In most newer trucks the blue wire is the trailer brakes.

Bruce
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Old 09-13-2006, 08:43 PM
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I thought Blue has always been the trailer Electric Brakes.

Anyway--For me since I was 17

Bryan

BTW--there IS a wiring standard for the
4-pin
5-pin
6-pin
7-pin connectors----Might want to go to a trailer supply or RV supply and get that information.

Last edited by Bryan59EC; 09-13-2006 at 08:46 PM. Reason: BTW
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Old 09-13-2006, 09:32 PM
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Quote:
Originally Posted by Bryan59EC
I thought Blue has always been the trailer Electric Brakes.

Anyway--For me since I was 17

Bryan

BTW--there IS a wiring standard for the
4-pin
5-pin
6-pin
7-pin connectors----Might want to go to a trailer supply or RV supply and get that information.

Here is a link that diagrams those standards.
Trailer Wiring Diagrams
If your truck has seperate turn signals, you may need to buy a convertor as well.

The factory setup is usually the way to go ... as it's "Plug & Play". The Ford ones (for example) plug right in, include a mounting bracket, and give you both a 4-wire and a 7-wire connection. Another benefit is that they are "done right" and are weather-proof.
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