TEST OR INSPECTION
Reconnect pump operator's panel wire harness ECU wire harness connector. Turn
battery disconnect switch to ON position (WP 0007). Start water pump
engine (WP 0022). With a test lead set, check for voltage fluctuation of 0 to 5 VDC at
wire 1966 from pump operator's panel pressure governor 12-terminal connector,
terminal 1 to a known good ground.
If steady 5 VDC are present, replace personnel cab governor control
panel (WP 0309).
If steady 5 VDC are not present, replace water pump engine
ECU (WP 0226).