TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
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TM 9–2350–311–20–2 3–51 Replace selector valve as- sembly (para 6–16). If mal- function persists, replace failed gunner’s control as- sembly (para 6–19 or 6–20). yes no Replace solenoid (para 6–16). CONTINUED FROM STEP D E CONTINUED FROM STEP A CONTINUED ON NEXT PAGE WIRE 623 ELEVATION CONTROL SWITCH GUNNER’S SELECTOR SWITCH BOX ASSEMBLY – + 1. Turn MASTER and CAB POWER switches to OFF. 2. Reconnect wire 623 to selector valve assembly solenoid. 3. Place ELEVATION CONTROL switch in NO. 1 MAN position. 4. Disconnect wire 623 from quick disconnect at gunner’s selector switch box assembly. 5. Place ELEVATION CONTROL switch in GUNNER position. 6. Turn MASTER and CAB POWER switches to ON. 7. Place red multimeter lead in wire 623 leading to gunner’s selector switch box assembly and black lead to ground. 8. Check for voltage. Is battery voltage present? Repair or replace wire 623 (para 8–8). yes no