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RE: 2012 Yukon not seeing trailer connected

Brakes are electric drum.
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gmcman
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08/09/22 12:34am |
Tow Vehicles
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RE: 2012 Yukon not seeing trailer connected

I don't know if the previous owner did, but it looked like none of the 12V leads were hooked up.
The two big fuses for the studs are in place, and I have 12V to each of the studs.
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gmcman
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08/03/22 09:32pm |
Tow Vehicles
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2012 Yukon not seeing trailer connected

I have the factory integrated brake controller,(JL-1) this is the 1st time it's being used as I had to connect the red wires to the studs.
Fuses are good, I have 12V at the studs.
I have 12V at the brake control relay or module located above the spare tire.
The blue wire is good between the module/relay to the 7-pin, and both sides of the 7-pin are clean.
No stored codes.
Trailer works on another vehicle, and the Yukon still doesn't work on a 2nd trailer.
I have also tried a new GM gain switch and module, still no change.
No error messages, but the Yukon still won't recognize when a trailer is connected.
Curious if anyone has dealt with this.
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gmcman
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08/03/22 07:14pm |
Tow Vehicles
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