TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
Page 163 of 828
TM 9–2350–311–20–2 3–52 3–3 TROUBLESHOOTING CHART — CONTINUED d. ELEVATING SYSTEM — CONTINUED (2) CANNON MOVES BY ONLY ONE CONTROL HANDLE, BUT MANUAL OPERATION IS NOR- MAL. – CONTINUED 1. Turn MASTER and CAB POWER switches to OFF. 2. Disconnect harness at J2 connector of gunner’s selector switch box assembly. 3. Place one multimeter lead at socket A of J2 connector harness and other lead to wire 623. 4. Check for continuity. Is continuity present? yes no F Repair wire 623 (para 8–8). CONTINUED FROM STEP E CONTINUED ON NEXT PAGE – + J2 CONNECTOR HARNESS SOCKET A WIRE 623 CONNECTOR Repair wire 623 from J2 connector to ELEVATION CONTROL switch (para 8–12). G yes no 1. Reconnect wire 623 to quick-disconnect at gunner’s selector switch box assembly. 2. Open gunner’s selector switch box assembly. 3. Place one multimeter lead on terminal 1 of ELEVATION CONTROL switch and other lead to pin A of J2 connector. 4. Check for continuity. Is continuity present? + – PIN A GUNNER’S SELECTOR SWITCH BOX ASSEMBLY ELEVATION CONTROL SWITCH TERMINAL J2 CONNECTOR