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Old 03-30-2019, 06:36 AM   #1 (permalink)
cptdondo
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Fitting a brake controller

I need to install a brake controller for a 2 axle trailer. I'm wondering if there are any wiring stubs or connections that would make this easier.

Anyone know if it's possible to install the factory controller?

Thanks!

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Last edited by OkDually; 03-30-2019 at 08:53 AM. Reason: prefix
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Old 03-30-2019, 06:57 AM   #2 (permalink)
cptdondo
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Sorry, I have a 2010 Chevy Duramax G4500 ambulance.

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Old 03-30-2019, 09:05 AM   #3 (permalink)
Jaycocamprs
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I know the vans are different, but the older pickups had a place on the firewall that they plugged into. You wired a GM style plug to the controller.
If you have the Owners Manual it would be worth a look
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Old 03-30-2019, 11:09 AM   #4 (permalink)
heymccall
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https://www.etrailer.com/vm/Chevrolet/Express+Van/bc

Nope...Vans are different than pickups in that respect. You'll have to wire in everything.
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Old 03-30-2019, 11:18 AM   #5 (permalink)
dmax3500
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2007.5 and up trucks,there is a set of 4 wires ,cut under the dash taped together
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Old 04-07-2019, 09:29 PM   #6 (permalink)
cptdondo
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Hey. Where do I find this bundle?
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Old 04-07-2019, 10:58 PM   #7 (permalink)
heymccall
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Van chassis don't have it
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Old 04-08-2019, 04:37 PM   #8 (permalink)
rdminter
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check on the medium duty board, there are multiple posts about this. I believe the wiring location is on the passenger side of the truck, located on the frame rail. Do not wire up the brake signal wire to the brake switch, this will cause problems.
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Old 04-30-2019, 07:58 PM   #9 (permalink)
cptdondo
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So the instructions say:

Red Wire (Vehicle Brake light) ConnectionThe requirements for a suitable connection of a brake controller trigger wire are quitespecific. This connection point must: Provide battery voltage output while the vehicle brakes are applied. Have 0 volts output while the vehicle brakes are not applied Accept battery voltage input when the brake controller manual over-ride is operatedand illuminate at least the trailer brake lights.

Where do I find a suitable location for this? Any ideas?
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Old 04-30-2019, 10:05 PM   #10 (permalink)
The_Ure
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2010_GH_Van_Elec_1_7_D1_100813.pdf

Page A-1
Trailer Wiring on Cutaways – RPO UY7 On 33803 vehicles (3500 Cutaway with 159 in w/b), Trailer Wiring (UY7) is now available with the 6.0L (LY6) gas engine, in addition to the 6.6L (LMM) diesel. •

Page A-32
ElEctrical Manual – 2010 G/H Full SizE Van
PAGE
A-32
Electrical Manual – 2010 G/H Full Size Van
Trailer Wiring Harness (UY7)
The optional heavy-duty trailer wiring package (UY7) includes a wiring harness, with a seven-pin connector at the rear of the vehicle and a four-wire harness assembly under the driver side of the instrument panel. The four-wire harness assembly comes without a connector.
If your vehicle does not have a trailer hitch, the seven-wire harness assembly with connector is taped together and located in a frame pocket at the driver side rear left corner of the frame. If your vehicle has a trailer hitch, the seven-wire harness assembly with connector is attached to a bracket on the hitch platform. In both cases, the seven-wire harness has a connector and includes a 30-amp feed wire.
The seven-wire harness connector contains the following trailer circuits:
• Light Green: Back-up Lamps (10A fuse)** • White: Ground • Dark Blue: Trailer Brake Signal • Dark Green: Right Rear Stop and Turn Signal* • Red/Black Stripe: Battery Feed (30A Fuse) • Brown: Trailer Park Lamp Supply Voltage (15A fuse)** • Yellow: Left Rear Stop and Turn Signal *
The four-wire harness (without connector) contains the following circuits:
• Black: Ground • Red/White: Battery Feed • Dark Blue: Trailer Brake Signal • Light Blue: CHMSL/Stoplamp Supply Voltage
* If your vehicle is a cutaway with trailer provisions, a 15 amp fuse will be shared for both left/stop trailer turn and right/stop trailer turn signals. However, the cutaway lighting connector will have a 10 amp fuse for each signal.
** If your vehicle is a cutaway with trailer provisions, a 15 amp fuse will be shared for trailer park lamps and cutaway rear lighting connector park lamps. Also, a 10 amp fuse will be shared for trailer back-up lamps and cutaway rear lighting connector back-up lamp.

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Last edited by The_Ure; 04-30-2019 at 10:05 PM.
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