Don't know amy detail about your system, but generally the pump motor will be powered by a fuse in the 125A range. If you measure the voltage on the pump solenoid switch, one of the large lugs should have 12V on it.
The control panel inside the coach will most likely be powered by a fuse or circuit breaker in a 12V panel along with many other fuses or breakers. You'll just have to look for their location.
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there are 2 sources of power. one is the battery cable located on the 12 volt relay strapped to the pump motor. it will be attached on one post of the master relay if you have 2 relays. make sure the battery connection and the relay connection are clean and tight. use the service manual diagrams to determine how it provides power to the control box. thats important. please read the service manual. knowing the sequence of operation is important, when trying to do a correct diagnosis.
the other is an attachment to the acc side of the inside fuse panel. a service manual gives you some info, but the mfg should be able to tell you exactly where they pick up the acc side. we dont control how they hook the system to theirs.
the mfg also decides whether to use the chassis battery or the house battery for power. be sure to check that also.
Linear Mode
