No 12 Volt Power on 7-Way Trailer Connector on a 2009 Chevy Silverado/GMC Sierra Diesel

Question

Question:

Troubleshooting No 12 Volt Power at 7-Way Trailer Connector on a 2009 Chevy or GM Duramax Pickup I have Duramax, dual battery setup. If I ohm out the wire taped to wiring harness, it does not attached to my 7 way trailer plug. I have no red black striped wire on my plug. Where does this wire go?

asked by: Tim W

0

Expert Reply:

It is possible that the 12 volt circuit is not present on your 2009 Chevy Silverado or GMC Sierra. For some reason GM did not always complete the tow package wiring. If the proper wires are not already present on your truck then you can manually run a wire from the main 12 volt battery to the 7-Way trailer connector.

You would just need about 25 feet of wire # 12-1-1 sold by the foot. And you can either use the 12 volt post and fuse location on the power distribution box or run the wire straight to the vehicle battery via a 40 amp circuit breaker # PK54540.

When routing the wiring be sure to avoid areas that can damage the wire such as engine, exhaust, and suspension components. I have included a link to a help article with tips on routing a power wire.

expert reply by: Michael H

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Answer 1

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Answer 2

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Answer 3

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Answer 4

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Answer 5

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Answer 6

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 7

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

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Answer 8

For sag from towing a trailer the best recommendation I can make is actually a weight distribution system. Suspension enhancement will help level your truck while towing. But the advantage to a weight distribution system is that it levels the vehicle…

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No 12 Volt Power on 7-Way Trailer Connector on a 2009 Chevy Silverado/GMC Sierra Diesel

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