The water pump is part of the 12VDC system, so turning off all of the circuit breakers won't make any difference. The only one that would matter is the REC/CON breaker. Turn that off, disconnect the battery and there's no 12VDC to the fuse panel.
Now, as for "why" the fuse keeps blowing: I'd guess that the water pump diaphragm and pressure switch froze, the pressure switch is in the ON position, so as soon as you install a fuse, the switch is calling for pump run, which is also frozen, so it overloads the fuse and blows immediately.
You might look for the water pump location, either put a drop light with a 60 watt incandescent bulb or a similar heat source near the pump and give it time to thaw. Once it does, it should be OK, unless it froze "solid enough" to have cracked the pump body. If so, it's a new pump or a new pump head. I'd try the "warm-up and thaw" process first.
__________________
John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
|