I went through the Maint. Topics and didn't find anything that matched up to my model. It's a '99 Epic 21, single ballast in rear with a single rocker switch above the throttle arm. By examining the ballast, drain & fill hoses it doesn't look like a reverse-polarity type pump, so I'm assuming there is a 2nd one somewhere. If you know where it's at or at least a general vicinity, I can look for it with out tearing apart half the boat. Thanks for any input, I appreciate it.