TEST OR INSPECTION
Remove rings, wristwatches, neck chains, and any other jewelry before working
around vehicle. Jewelry can catch on equipment and cause serious injury. Jewelry
and tools may short across electrical circuits and cause damage to equipment, or
severe burns or electrical shock to personnel.
Turn battery disconnect switch to OFF position (WP 0007). Remove cab instrument
panel B (WP 0311). Disconnect cab pump control wire harness START PUMP STOP
switch connector. Turn battery disconnect switch to ON position (WP 0007). Check for
22 to 28 VDC between wire 4070 (white) from cab pump control wire harness START
PUMP STOP switch connector, terminal 5 to a known good ground.
If 22 to 28 VDC are not present, go to Step 5.