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.
Remove relay 10 from cab power distribution block (WP 0402). Check for 22 to 28 VDC
between cab power distribution wire harness wire 2816 (red) from cab power
distribution block relay 10, terminal 3 to a known good ground.
If 22 to 28 VDC are not present, replace cab power distribution wire harness
and block (WP 0441).