TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 352 of 1275
TM 9-2350-311-20-1 3-3 TROUBLESHOOTING CHART — CONTINUED u. SERVICE HEADLIGHTS, TAILLIGHT, AND STOP (4) TAILLIGHT FAILS TO OPERATE; ALL OTHER LIGHT CIRCUIT — CONTINUED LIGHTS OPERATE Tools General mechanic’s tool kit (item 64, Appx H) Driver’s instrument panel released (para 8-17) Multimeter (item 36, Appx H) Taillight cover removed (para 8-25) TA-1 probe kit (item 43, Appx H) 1. Remove taillight bulb (para 8-25). 2. Place red lead of multimeters in center contact and black lead to ground. 3. Turn MASTER switch ON, place main light switch to SER. DRIVE position, and check for voltage. 4. Turn MASTER switch OFF. Is voltage present? Replace taillight bulb (para 8-25). B 1. Install taillight bulb in socket (para 8-25). 2. Disconnect bulkhead-to-driver’s instrument panel wiring harness from main light switch. 3. Place a jumper wire from socket F (lead 15) to socket H (lead 21). 4. Turn MASTER switch ON and check taillight for operation. 5. Turn MASTER switch OFF. Does taillight operate? Replace light switch (para 8-17). I Repair or replace lead 21 of bulkhead-to- driver’s instrument panel wiring harness (para 8-50). END OF TASK 3-252