Stus-List Re: Bilge pump breaker issue

[Dave S via CnC-List]

Use a multimeter to measure resistance, +12v to  ground, from the load (pump) side of the breaker, with the breaker open, and the float switch open.   It should show infinite resistance.  If it shows very low or no resistance, you have a short.   Disconnect the pump/switch.    If the problem persists, it’s not the pump, it’s the wiring.   If there IS infinite resistance, then close the switch.   You should see the motor’s resistance.  If you see zero resistance, the Pump has likely developed a short.  Change the pump.   Similarly, You can also disconnect the pump, and measure the wiring and the pump’s resistance separately.  Same idea.   Dave  Ex 33-2  Sent from my iPhone On Apr 7, 2024, at 10:09 PM, cenelson--- via CnC-List <cnc-list@cnc-list.com> wrote:  My bilge pump breaker has recently started to disconnect immediately after being switched on. I suspect my rule pump has failed and developed a short to ground although it might be a wire that has either shorted or it might be the water witch float switch. My thought is to just replace the pump and see if that does it—I have an identical spare pump on board.   BTW, I never rely on the float switch when away from the boat—so this breaker is always off unless I am on board.  Other suggestions from listers are welcome. Thanks, Charlie Nelson C&C 36 XL/kcb Water Phantom Sent from the all new AOL app for iOS Please show your appreciation for this list and the Photo Album site and help me pay the associated bills.  Make a contribution at: https://www.paypal.me/stumurray Thanks for your help. Stu

Please show your appreciation for this list and the Photo Album site and help 
me pay the associated bills.  Make a contribution at:
https://www.paypal.me/stumurray
Thanks for your help.
Stu