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Old 07-06-2018, 08:38 AM   #20
95 S_Trucker
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Join Date: Oct 2009
Location: Lancaster, PA
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Re: 99 K1500 Suburban no high speed ac fan

Check the area circled in red. It should have 12v. Your symptoms tell me you don't have 12v at the A2 terminal at the relay. It's the only red wire at the relay.

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