TEST OR INSPECTION
Turn battery disconnect switch to OFF position (WP 0007). Check for continuity across
pump house power distribution wire harness wire 1640 (black) from relay P10, terminal
85 to a known good ground.
If there is continuity, replace relay P10 (WP 0402).
If there is no continuity, repair wire 1640 in pump house power
distribution wire harness if repairable (TM 9-2320-325-14&P), or
replace pump house power distribution wire harness and
block (WP 0457).