TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 366 of 1275
TM 9-2350-311-20-1 3-3 TROUBLESHOOTING CHART — CONTINUED v. B.O. MARKERS AND B.O. DRIVE LIGHTS (4) ALL B.O. MARKER LIGHTS FAIL TO OPERATE; ALL CIRCUIT — CONTINUED OTHER LIGHTS OPERATE Tools General mechanic’s tool kit (item 64, Appx H) Driver’s instrument panel released (para 8-17) Multimeters (item 36, Appx H) TA-1 probe kit (item 43, Appx H) 1. Disconnect bulkhead-to-driver’s instrument 2. 3. 4. panel wiring harness from main light switch. Place a jumper wire from socket F (lead 15) to socket E (lead 20/24). Turn MASTER switch ON, apply brake pedal, and check B.O. marker lights for operation. Turn MASTER switch OFF. I Do B.O. marker lights operate? Replace light switch (para 8-17) I Repair or replace lead 19 and/or 20/24 of bulkhead-to-driver’s instrument panel I wiring harness (para 8-50). END OF TASK 3-266