Trailer and Brake Wiring a Peterbilt Truck to Tow a Gooseneck Trailer

Question

Question:

I want to use a goose neck with my peterbuilt truck what do I have to do for all light to work and the breaks of the gpose neck I ask what do I have to do

asked by: Jaime F

1

Helpful Expert Reply:

When connecting a gooseneck trailer to a big rig truck like your Peterbilt, you will need to change the trailer wiring from the commercial style to a RV style connection.

Using a kit like the ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit # 119250KIT, will allow you to wire a 4-flat pole connection to your Peterbilt. The ModuLite unit will help separate the tractor's lighting circuits to be connect to your trailer. The module has it own separate power source that will come from your vehicle's battery.

Next, to install a brake controller on your rig, you will need to install an # ETBC7 Brake Controller Installation Kit. The is kit will include a 7-way connecter, electrical components and wire to allow you to install a brake controller in the cab of your truck. The 4-flat pole connecter that you install will plug in to the 7-way connecter to run the trailer lights.

I recommend the Tekonsha Prodigy P3 Brake Controller, # 90195, for the brake controller for your Peterbilt truck. The P3 is a proportional controller that will activate your trailer brakes on how intense you are applying the brakes in your tow rig. The hard you press on the brakes the more braking power will be sent to the trailer brakes.

I have attached two help articles that give more info in the # ETBC7 kit and information on installing a brake controller from scratch.

expert reply by: Jared P

1

Answer 1

You certainly can! Installing a brake controller is fairly easy if you are familiar with running wiring. To install a brake controller like the popular Tekonsha Prodigy P3 #90195 you will need to run the wires on the pigtail to the following…

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Answer 2

The Bargman 7-Way Super Sealed Connector #50-87-004 you received actually uses the standard wire coloring for camping trailers. The color code is labeled on the front of the 7-way's cap to try and make it easier. We always recommend to connect…

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Answer 3

If you connect the trailer brake light circuit to the trailer brake circuit your brakes would lock up immediately since 12 volts is max braking voltage for trailer brakes. You'd need a brake controller that can vary voltage so that you can apply…

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Answer 4

Either way is correct. It depends on if you want to keep the semi-style 7-Way (if you need to tow that type of trailer) or if you will never be towing a semi-trailer. If you need to keep the 7-Way semi active on the truck, then you would need to make…

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Answer 5

A replacement coupler option that is very similar to the existing coupler on your EZ Loader Trailer is the Dexter DX7.5L A-60, Drum, 2 Inch Ball Brake Actuator #DX33FR. Dexter acquired UFP, so actuator is essentially an updated version of your…

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Answer 6

To replace your old UFP A-70 actuator I recommend using the Dexter DX7.5L A-60 Brake Actuator - Bolt On - Drum - 2" Ball - Zinc - 7,500 lbs #DX33FR. This is going to be a direct replacement and will work with your drum brakes.

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Answer 7

When bleeding the brakes on a surge actuator, such as the Dexter DX7.5L A-60 Brake Actuator w Electric Lockout #DX56FR, you want to start by making sure there is fresh fluid in the reservoir then press a screw driver against the rod in the access…

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Answer 8

The Replacement Shock Absorber Spring Kit #TK71-758-00 is the correct shock for your UFP Surge Brake Actuator. The picture you included does not specify if it is for a disc or drum brake set, so I have found both for you to choose from. Disc Brake…

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Answer 9

For your application I recommend replacing your brake actuator with the Dexter DX7.5L A-60 Brake Actuator #DX27FR. This is a bolt-on application rated for 7,500 lbs and is compatible with a 2" hitch ball. UFP is owned by Dexter now and this is…

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Answer 10

The #99 trailer spindle is typically found on 9,000 lb and 10,000 lb axles. This is not a spindle that we carry at this time, but I did find some of the measurements. I have attached a diagram showing the dimensions of a #99 spindle for you to check…

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Answer 11

Because the functions on a semi 7-Way connector are different than those in the RV industry a regular adapter would not work. Some of the circuits have to be combined so a converter is needed. It would actually be easier to just add an RV style 7-Way…

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Answer 12

There are traditional and standard wiring configurations and that can be frustrating when working with electrical connectors. We try to always remind customers to check wiring for function and not to rely on the color of the wires for that reason.…

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Trailer and Brake Wiring a Peterbilt Truck to Tow a Gooseneck Trailer

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