2019 F150 Trailer Brake Controller Wire Size
Question:
I have the plug that shipped with my new F150 in the glove box to install an aftermarket brake controller. I am only pulling a single axle trailer so just 2 brake units. The Trailer brake controller instructions I see on your site show to use a 12ga wire for the ground, power and brake wire, but the adapter plug in the truck is using very small wires. Do you know if they have a relay to carry the high current to the trailer brakes, or should I just start from scratch and wire the controller in as if it did not have the plug built into the truck?
asked by: Ralph S
Expert Reply:
I'm not entirely sure a relay is used on that circuit, but it would provide a good explanation for the smaller wire gauge used on the factory pigtail. There's really no need to hardwire the controller. If the small wire gauge concerns you, there's an aftermarket one available, part # 22292.
The black power wire and the blue brake output wire are both 12 gauge and the red stop lamp switch wire and the ground wire are both 16 gauge. This harness is designed for use with Tekonsha brake controllers, but we also offer the # C51436 for Curt controllers, # HM47845 for Hopkins, or # HA81794-HBC.
I've linked to a video showing a brake controller install on a 2018 Ford F150. The procedure for your truck would be the same.
Products Referenced in This Question
Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers
- Accessories and Parts
- Trailer Brake Controller
- Wiring Adapter
- Plugs into Brake Controller
- Vehicle Specific
- Tekonsha
more information >
Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In
- Accessories and Parts
- Trailer Brake Controller
- Wiring Adapter
- Plugs into Brake Controller
- Vehicle Specific
- CURT
more information >
Custom Wiring Adapter for Hayes Brake Controllers - Dual Plug
- Accessories and Parts
- Trailer Brake Controller
- Wiring Adapter
- Plugs into Brake Controller
- Vehicle Specific
- Hayes
more information >
Hopkins Plug-In Simple Brake-Control Wiring Adapter - Ford
- Accessories and Parts
- Trailer Brake Controller
- Wiring Adapter
- Plugs into Brake Controller
- Vehicle Specific
- Hopkins
more information >
Product Page this Question was Asked From
Curt T-Connector Vehicle Wiring Harness with 7-Way Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Custom Fit
- 7 Round - Blade
- CURT
more information >
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