How To Install a 7-Way Trailer Wiring Harness On a 2019 Subaru Ascent
Question:
Installed the following on the Ascent and using a Tekonsha P2 controller: 76253 Draw-Tite Max-Frame Trailer Hitch Receiver - Custom Fit - Class III - 2 C56040 Curt T-Connector Vehicle Wiring Harness 4-Pole Flat Trailer Connector ETBC7 Universal Installation Kit for Trailer Brake Controller - 7-Way 3062-P Tekonsha brake controller wiring harness Ive ran the 10 ga wire to the front of the vehicle. Just want to confirm the connections I reviewed the instructions for the ETBC7, but it appears to be for direct wiring the brake controller. - Black wire - connects to battery using the 40-amp breaker. Does this need to be covered somehow since its a hot wire? - White wire - Use the 20- or 30-amp breaker for Tekonsha controller? Since using the 3062-P, I assume this goes through the firewall and connects to the Blue wire on the brake controller harness and all other wires are connected through the plug?.
asked by: Mike
Expert Reply:
There are two different 7-way trailer wiring harnesses for a 2019 Subaru Ascent dependent on whether or not you have the factory tow package. If you do have the factory tow package then you should be using the Tekonsha OEM Replacement Vehicle Wiring Harness part # 118290, not the Universal Installation Kit for Trailer Brake Controller part # ETBC7. If you found a plug under the dash for the Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers part # 3062-P then you have the factory tow package.
Therefore, if you have the factory tow package you don't need to run a wire from the trailer connector to the brake controller but you will need to run one from the trailer connector to the battery. If you don't have factory tow package then you will need to run both the black wire from the trailer connector to the vehicle's battery and the blue then white brake output wire up to the back of the brake controller. The black battery charge line circuit that runs from the trailer connector to the vehicle's battery does not need to covered but it would be a good idea to do so with some wire loom, part # 7509-10 will do the job though you may need two.
Products Referenced in This Question
Tekonsha OEM Replacement Vehicle Wiring Harness with 7-Way Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Powered Converter
- Custom Fit
- 7 Round - Blade
- Tekonsha
more information >
Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers - Dual Plug In
- Accessories and Parts
- Trailer Brake Controller
- Wiring Adapter
- Plugs into Brake Controller
- Vehicle Specific
- Tekonsha
more information >
Wire Loom 1/4" Diameter, 10' Long
- Wiring
- Wiring Protection
- Wire Loom
- 1/4 Inch Diameter
- Spectro
more information >
Product Page this Question was Asked From
Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Accessories and Parts
- Trailer Brake Controller
- Installation Kits
- etrailer
more information >
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