You say you’ve confirmed power through the top hat to the pump. This makes me ask the question how? I’m assuming a digital multi meter? If so you may have just discovered one of the limitations of a dmm or logic probe that can bite a lot of people in the ***. They only do a sample of voltage but they are high impedance and do not show if the wiring is able to supply the needed current (example you will never detect a highly resistance ground by just checking voltage at the pump). So you’ve confirmed you have voltage to the pump, great now check ground voltage drop, use a read test light clipped to ground and see if the power side can light the light, or even better if you have a power probe supply your own ground at the pump and see if it spins, if not then Supply power. You need to find which side is having the resistance.
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