2002 Nautique 216 ballast pumps

Hello,
Used boat, New to me.
Has anyone ever replaced the ballast pumps on a 2002 216? My boat is the "team edition" which includes the push button fill option. When I push the button to fill, my battery volts go to zero. About 3 seconds later the breaker will pop.... The pumps don't seem to be humming at all. Sea cocks were open.

1) pumps shot?
2) bad ground wire?

Thoughts?

I read reviews that the Tsunami 800GPH will replace them. But I am not sure if I'm ready to embark on a weekend warrior project.

Thanks