The headlamp and windshield wiper motors are on the same fuse, and that fuse is 15amps. I doubt it is anywhere close to that amperage for just one of the motors, assuming it's 50%, that'd be a max of 7.5amps for start up current. Once it's running, it will be a lower amperage draw. You could hook your meter in line with that pump and see what amperage it is drawing. Either way it's moot since your clip is broken, but it would be fun to see if the top shoots out of the housing!
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