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 relay 13 from cab
power distribution block (WP 0402). Install fuse FS 8 (WP 0401). Turn battery
disconnect switch to ON position (WP 0007). Check for 22 to 28 VDC between cab
power distribution wire harness wire 1361 (grey) at relay 13, terminal 1 and terminal 5 to
a known good ground.
If 22 to 28 VDC are not present at both terminals, replace cab power
distribution wire harness and block (WP 0441).