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The power comes from the 30 Amp maxi breaker.
CLICK HERE to see the relay and the power point for the pin you are referencing.
if you have power at the maxi breaker, but not the relay, then the PDM might be bad with the board inside. Usually the breaker is bad or it is tripped because the blower motor is puling too many amps and causing the breaker to remain open.
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