Rad fan circuit on tow package

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Ksat

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Anyone familiar with the electric rad fan circuit on the '06 with tow package? That's with the single speed motor. With the a/c on, the fan only runs for a few minutes before power gets cut and P0480 is triggered. The motor is new and is drawing ~13A. Cycling the key a few times usually restores power, but it goes out again shortly after. When I disconnect the motor's electrical connector, I'm getting the expected voltage at those terminals during a given trip. It's just when I plug it back in does the trouble start.

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