Originally Posted by heliflyer

Use a multimeter that measures current (most good ones will measure up to 10 amps) and place it in series with the positive connection to the pump. when you activate the circuit you will be able to see what current the pump is drawing.

Originally Posted by sstrickstein

I just replaced both my pumps today. And I removed the hose from before the hood. Left that open and sprayed two tanks full of water out. Still brown. The stuff that came out smelled like ****. I am going to do this more. And once in a while the pump clogs. when that happens I take compressed air and squirt back down in the hose until the air bubbles up out of the tank. I thinking of using the same stuff that you are supposed to use to flush cooling systems. I figure a couple more tanks full and a flush and the crap should be clean.