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). Put EMERG MASTER
switch to off position (WP 0004). Remove skid plate grille (WP 0550). Disconnect main
wire harness siren speaker connector. Remove personnel cab instrument panel
A (WP 0311). Disconnect cab power distribution wire harness siren control connector
MP2. With a test lead set, check for continuity across wire 1052 (brown) from main wire
harness siren speaker connector, terminal B to cab power distribution wire harness
siren control connector MP2, terminal A.