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Which Wire from 7-Way Connector Gets Ran to Brake Controller  

Question:

Ok do I leave the harness from controller to connector near emergency brake still plugged in? Then splice in the blue wire at p3 controller?

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Expert Reply:

It's actually the blue wire of your 7-way that you'll need to run up to the brake controller to make it active. You'd run this wire to the blue wire of the controller and as long as the controller is wired up the rest of the way you'd be in business. You'll want to use 10 gauge wire like part # 10-1-1 (sold by the foot).

I attached a picture that shows how a brake controller normally wires up to a vehicle and 7-way.

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Jameson C
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Vincent S.

1/25/2019

Ok do I leave the harness from controller to connector near emergency brake still plugged in? Then splice in the blue wire at p3 controller?

Jameson C.

1/25/2019

Yes, leave the connector plugged in and then cut the blue wire out of the harness and run the wire from the 7-way to it.

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