TM10-3930-660-20 17-7. CAB DEFROSTER FANS - REPLACE This task covers: a. Removal b. Installation Initial Setup Tools Tool Kit, Automatic Mechanics Materials/Parts Lockwashers (6, 9, 10) Loctite 242 (App. C, Item 39) Equipment  Condition Vehicle parked on level ground. Negative battery cable disconnected, para.  8-44. 1. REMOVE FAN (1) WIRING. a. Disconnect male connector (2) from cab harness female connector (3). b. Disconnect fan ground wire (4) by removing nut (5), lockwasher (6) , flatwasher (7), clamp (8) lockwasher (9), ground wire (4), and lockwasher (10). 17-19