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How to Bypass 12 Volt Trailer Wiring Accessory Circuit Not Functioning on New Ford Truck  

Published 09/23/2020

Question:

Will this Vehicle End Test Unit apply enough load on the circuits of the newer Ford superduty trucks to activate the 12v power to the 7way trailer connector?

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Expert Reply:

It would not as it's only really designed to see if voltage is present. The new Ford trucks need a specific amount of load on the circuits to activate the 12 volt circuit which is pretty annoying. If you are looking for a way to bypass that let me know as we can help.

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Jameson C
Chad profile picture

Chad

9/23/2020

Will this Vehicle End Test Unit apply enough load on the circuits of the newer Ford superduty trucks to activate the 12v power to the 7way trailer connector?

Jameson C. profile picture

Jameson C.

9/23/2020

What you'll need is 10 gauge wire like part # 10-1-1 (sold by foot) and a circuit breaker like part # 9510. You'll run a length of wire from the 1:00 pin of the 7-way to the positive post of your truck's battery through the breaker and you'd have the circuit bypassed and no longer have to deal with the problem.

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