7-68. AIR STOPLIGHT SWITCH REMOVAL AND REPLACEMENT (TRUCKS M275A1 AND M275A2).
2 1/4-inch open end wrench
Truck parked, engine off, handbrake set.
EQUIPMENT CONDITION :
(1) Vent air system pressure. Refer to Part 2, para 13-20.
(2) Disconnect battery ground cable. Refer to para 7-58.
Make sure that main light switch is set to OFF
position or electrical damage may result.