TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
Page 240 of 828
TM 9–2350–311–20–2 3–128 3–3 TROUBLESHOOTING — CONTINUED j. NBC SYSTEM CIRCUIT — CONTINUED (2) NBC SYSTEM DOES NOT OPERATE. — CONTINUED Replace wire 13 (para 17–4). 1. Place one multimeter lead to X1 terminal on electromagnetic relay K1 and other lead to GND terminal of electromagnetic relay K1. 2. Check for continuity. Is continuity present? Replace wire 2. yes no I CONTINUED FROM STEP H yes no Replace ground wire 7 (para 17–4). J yes no Replace electromagnetic relay K1 (para 17–4). If malfunction persists, in- spect NBC power lead as- sembly and repair if dam- aged (para 8–9). END OF TASK + – + – X1 TERMINAL GROUND WIRE 7 RELAY K1 GND TERMINAL GND TERMINAL J2 CONNECTOR GND TERMINAL GROUND WIRE 13 RELAY K1 1. Place one multimeter lead to GND terminal of electromagnetic relay K1 and other lead to GND terminal of J2 connector on NBC control box assembly. 2. Check for continuity. Is continuity present? NBC CONTROL BOX ASSEMBLY