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). Release PUMP COOLER
switch (WP 0004). Remove cab instrument panel B (WP 0311). Disconnect cab pump
control wire harness PUMP COOLER switch connector. Turn battery disconnect switch
to ON position (WP 0007). Check for 22 to 28 VDC between cab pump control wire
harness wire 2834 (red) at PUMP COOLER switch connector, terminal 5 and a known
If 22 to 28 VDC are not present, go to Step 11.