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I get no reading (infinity) on any of the 3 pins on the solenoid.

Yes, When both are connected the breaker trips. If you disconnect the AUX pump power lead with the other two connected, the breaker trips. The pump does run. If you disconnect ONLY the float switch connector, the breaker does NOT trip. If you disconnect ONLY the AUX fuel solenoid, the...

Any additional ideas on tracing down this electrical gremlin? Sure would appreciate it.

Anyone know how I can check the AUX fuel solenoid to see if it is bad? That seems to be the next logical step.

The AUX fuel pump looks to have been replaced at some point with a Facet brand pump. The two wires going into the AUX solenoid were twisted together and wrapped with electrical tape instead of being properly spliced. Whoever did this replacement also reversed the two wires. I now have the...

FWIW, I just tested both switches for continuity per TM 5-6115-584-12 and they both test good

2 of the 3 pins have readings in the 12-1300 range. The third pin is nada I put the original float switch back in and none of the pins have a reading

I have been working on a low hour MEP 002A trying to get the various small problems resolved. The latest thing to pop up is a seeming problem with the fuel level float switch. Whenever the master switch is placed in the RUN/AUX position, the breaker on the panel pops. I replaced the float...