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 E (WP 0311). Disconnect rear step buzzer audio alarm connector. Check for
continuity across cab power distribution wire harness wire 1647 (brown) from rear step
buzzer audio alarm connector, terminal B to rear step buzzer indicator, terminal.
If there is no continuity, repair wire 1647 in cab distribution wire harness if
repairable (TM 9-2320-325-14&P), or replace cab distribution wire harness
and block (WP 0441).