TEST OR INSPECTION
Turn battery disconnect switch to ON position (WP 0007). Turn Service Drive Lights On
(TM 9-2320-347-10). Put EMERG MASTER switch to on position (WP 0004). Check
for 22 to 28 VDC between cab instrument panel wire harness wire 1625 (white) at
ROOF EMERGENCY LIGHTS switch connector, terminal 6 and a known good ground.
If 22 to 28 VDC are present, go to Step 10.