If the float switch fails to trigger the pump during a bypass test, the internal mechanism is likely degraded and requires replacement.
Disconnect the main battery power to the bilge pump circuit to prevent accidental activation during the repair.
Remove the existing float switch by unscrewing its mounting base from the bilge floor.
Cut the existing wiring, ensuring you leave enough slack to reach the new switch leads.
Install the new marine-grade float switch, ensuring it is mounted level and clear of any obstructions in its full range of motion.
Connect the new switch wires using waterproof, heat-shrink butt connectors to prevent future wicking corrosion.
Reconnect the battery and perform a final manual test to confirm the pump activates correctly.
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