Debugging ANOTHER failed bilge pump

[gregc]

Replaced all three pumps last fall. Noticed this weekend that the middle pump has failed. The 2 minute intermittent light flickers, but no pump. Turning it on manually also results in no pump action.

Now, this is odd.

What electrical gremlins should I look for? Its improbable that this new pump has already aged out or faulted....

 

[Jcat2010]

Ah bilge pumps. My favorite gremlin. First check if you are getting voltage at the pump. Yellow should be ground and brown blue (depends on your schematic) is the always on auto. Should be voltage across these always. The yellow black should show voltage when the manual override is on. If not, then start back tracking wiring and fuses until you find issue. With neither working it is most likely a ground wire failed, so check your voltage across the hots to another working ground. Also can try jumpering from a known hot like battery to the pump and if that doesn't solve the pump is likely at fault. Under warranty if you just replaced.

Joe