TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
Page 216 of 828
TM 9–2350–311–20–2 3–104 3–3 TROUBLESHOOTING — CONTINUED i. INTERCOMMUNICATION SYSTEM — CONTINUED (1) INTERCOMMUNICATION SYSTEM WILL NOT OPERATE. — CONTINUED Repair or replace wire 148 from harness connector to power relay box assembly (para 8–14). yes no C CONTINUED FROM STEP B yes no Repair ground lead (para 8–14). CONTINUED ON NEXT PAGE D – + – + POWER RELAY BOX TO INTERCOM POWER SUPPLY HARNESS CONNECTOR SOCKET A 1. Turn MASTER switch to OFF. 2. Reconnect wire 148 at power relay box assembly. 3. Disconnect power relay box to intercom power supply harness connector from cable CX4720. 4. Turn MASTER switch to ON. 5. Place red multimeter lead in socket A of harness connector and black lead to ground. 6. Check for voltage. Is battery voltage present? 1. Turn MASTER switch to OFF. 2. Place one multimeter lead in socket B of power relay box to intercom power supply harness connector and other lead to ground. 3. Check for continuity. Is continuity present? POWER RELAY BOX TO INTERCOM POWER SUPPLY HARNESS CONNECTOR SOCKET B