TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
Page 236 of 828
TM 9–2350–311–20–2 3–124 3–3 TROUBLESHOOTING — CONTINUED j. NBC SYSTEM CIRCUIT — CONTINUED (1) NBC CONTROL BOX ASSEMBLY INDICATOR LIGHT DOES NOT ILLUMINATE, BUT NBC SYSTEM OPERATES – CONTINUED. C 1. Place one multimeter lead on X1 terminal of electromagnetic relay K1 and other lead to negative terminal on LED housing DS1. 2. Check for continuity. Is continuity present? yes no Repair wire 4 (para 17–4). Replace LED housing DS1. END OF TASK RELAY K1 – CONTINUED FROM STEP B DS1 TERMINAL X1 TERMINAL + LED HOUSING DS1 WIRE 4