TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 123 of 1275
TM 9-2350-311-20-1 (2) MASTER SWITCH INDICATOR LIGHT FAILS TO OPERATE; MASTER SWITCH IS ON Tools General mechanic’s tool kit (item 64, Appx H) Multimeter (item 36, Appx H) TA-1 probe kit (item 43, Appx H) Engine access doors open (TM 9-2350-311-10) A 1. Remove MASTER switch indicator light from socket. 2. Place red lead of multimeter in socket and black lead to ground. 3. Turn MASTER switch ON, and check for voltage. 4. Turn MASTER switch OFF. Is voltage present? Replace LED (para 8-17). 1. Disconnect lead 459L from MASTER switch indicator light. 2. Place red lead of multimeter in lead 459L and black lead to ground. 3. Turn MASTER switch ON, and check for voltage. 4. Turn MASTER switch OFF. Is voltage present? Replace MASTER switch indicator I I light socket (para 8-17). CONTINUED ON NEXT PAGE 3-23