trailer brake wiring Ford vs GMC

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Hillboy

Free Member

Nov 26, 2007

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Lake Cle Elum

• Feb 1, 2009

• #1

So buddy is going to haul my 4 place enclosed next weekend we plug it in all the lights work but no brakes.... works fine on my Ford but not on his GMC, Are they not wired the same? I have hooked my Ford up to other trailers with no problem His GMC is a 2008 2500 my Ford a 2000 350.

 

SaberKitty

Well-known member

Lifetime Membership

Nov 15, 2006

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Foothills of Grosse Gelb

• Feb 1, 2009

• #2

No brake lights or no electric trailer brakes?

To hook up a brake controller on a 2007+ GM truck (without the factory controller) check out these instructions I made up back in 2007.

2007+_GM_Prodigy_Install

 

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Hillboy

Free Member

Nov 26, 2007

356

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Lake Cle Elum

• Feb 1, 2009

• #3

Brake ligths and everything else is fine just no brake controller, the GMC came with the onboard controller from the factory

 

C

Coxy

Free Member

Nov 26, 2007

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Kootenays!

• Feb 1, 2009

• #4

All brake wiring on vehicles should be identical through out the years, more or less to a "code" of sorts. You wouldnt think there would be a ground issue on a truck that new, but might be something worth checking out? Or read over the Gm's manual again, and see if theres a little trick your missing. I put a fancy plug and play aftermarket controller in my 05 Ford, and everything seems to work normal... Hopefully its something easy for ya!

 

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wildreaper

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Dec 2, 2007

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• Feb 3, 2009

• #5

Make sure the fuse is in under the Hood, It is STUD 1 or Stud 2 or both 30 amp Fuse.

 

H

Hillboy

Free Member

Nov 26, 2007

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Lake Cle Elum

• Feb 3, 2009

• #6

I think we have narrowed it down to his camper installation, without the camper on the brakes work great....

 

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golfsnownut

Free Member

Nov 30, 2007

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Bismarck, North Dakota

• Feb 16, 2009

• #7

I do think that Ford and Chevy might have different wiring schematics. The enclosed trailer interior lights will work with my friend's 2000 Ford F250 powerstroke but will not work with my 2005 Chevy Duramax.

 

Last edited: Feb 16, 2009

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Hillboy

Free Member

Nov 26, 2007

356

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Lake Cle Elum

• Feb 16, 2009

• #8

Yep something is different but the major things work as long as the chevy does not have a blown fuse

 

W

Wyoming T/A

ACCOUNT CLOSED

Sep 26, 2006

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Powell,Wyoming

• Feb 16, 2009

• #9

all makes for the last 10 years plus are wired identicle--some people have a trailer wired with a center pin brake instead of auxillery power and there for switch the wires in there truck to match and thats where they mess up--test where the brake controler wire is on your truck then ck the gmc should have the wiring diagram on the flip cap---been the same for yeaaaaars

 

Blu Du

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Feb 19, 2008

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Nisswa Mn.

• Feb 16, 2009

• #10

what would i need to do to get 12 volt lights in trailer to run off the truck. it works when hooked to a ford but not my chevy

 

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golfsnownut

Free Member

Nov 30, 2007

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Bismarck, North Dakota

• Feb 16, 2009

• #11

Blu Du said:

what would i need to do to get 12 volt lights in trailer to run off the truck. it works when hooked to a ford but not my chevy

Click to expand...

There you go! I am not only one with similiar problem... see my thread above

 

O

Oehlke Farms

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Dec 20, 2007

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• Feb 18, 2009

• #12

You GM guys need to go under your hoods and open the fuse box and add a fuse. Stud 1 and stud 2 should be used. I believe they should be 30 amps. They are bigger style fuses, not sure what style.

 

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BigRed118

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Dec 21, 2006

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• Feb 18, 2009

• #13

The new body 07.5 and newer have a wire that is bundled by the fuse box. this needs to be attached to either stud 1 or 2 at the front of the fuse box. The fuse is already installed. There are 2 of them there. One is for an aftermarket brake controller and one of for the factory controller. Hook them both up and check your plug at the back of the truck.