Bilge pump diag.
Step 1
Take a volt meter, hook the black wire to the negative of the battery, take the red lead and check for hot on 1 side of the switch (while switch is in the off position) turn the switch on check for hot on both side of the switch now.
*if you don't have power on either side of switch while switch is off check power to switch.
*if you don't have power on both side while switch is on R&R switch. If you do go to step 2
Step 2 while the switch is on, check for power at the pump, black lead to negative on battery, red to hot side of pump, with switch on
*if you have no power on the hot side of the pump you have an open circuit somewhere between the switch and pump on the hot side, if you have power go to step 3
Step 3 red wire on multi meter to hot side of battery, black lead on multi meter to negative on pump, with switch on
* if you have no power then you have an open circuit on the negative side between your pump and ground source
*if you have power, bad pump R&R pump.
Repeat steps for livewell pump.
Btw, this assumes you have already checked fuses and breakers.
Side =sides tired Been working on jet skis all day!