TM10-3930-660-20 8-40. BACK-UP ALARM - REPLACE This task covers: a. Removal b. Installation Initial  Setup — Tools Tool Kit, Automotive Mechanics Equipment  Condition Vehicle parked on level ground. Materials/Parts Lockwashers  (5) Reference TM10-3930-660-10 Negative battery cable disconnected, para.  8-44. Load backrest removed from storage position,  TM10-3930-660-10. 1. DISCONNECT Disconnect connectors ELECTRICAL LEADS. two female spade (1)  of  vehicle  wiring harness from two male spade connectors (2) of back-up alarm (3). 2. RBMOVE MOUNTING HARDWARE. Remove nuts (4), lockwashers (5), and back-up alarm (3) from studs (6). Discard lockwashers (5). INSTALLATION 1. INSTALL BACK-UP ALARM AND MOUNTING HARDWARE . a. Position back-up alarm (3) on studs (6). b. Install new lockwashers (5), and nuts (4) to secure back-up alarm (3) to studs (6). 8-101