The livewell in my AC1622 stopped working. I bought a new johnson 1000 gph cartridge pump and swapped it out. It worked briefly and then stopped working again. I've done a lot of troubleshooting but am about stumped. The voltage at the pump is about 12.4v without the pump running. The moment I turn the pump on the voltage at the pump drops to 10.8v and then bounces around. The pump stopped working and just makes a slight thumping noise which coincides with the voltage drops. Does anyone have any good suggestions on what I should try or know of a marine mechanic in the Sarasota or nearby area that is great with this sort of thing?