TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
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TM 9-2350-311-20-1 CAUTION B.O. drive light must be kept free of foreign material such as dirt, oil, grease, and fingerprints. Failure to do so will cause damage to halogen bulb. (3) B.O. DRIVE LIGHT FAILS TO OPERATE; ALL OTHER LIGHTS OPERATE T OO I S General mechanic’s tool kit (item 64, Appx H) Multimeters (item 36, Appx H) TA-1 probe kit (item 43, Appx H) Driver’s instrument panel released (para 8-1 7) A 1. Disconnect bulkhead-to-driver’s instrument panel wiring harness from main light switch. 2. Place a jumper wire from socket F (lead 15) to socket D (lead 19/520). 3. Turn MASTER switch ON, place main light switch to B.O. DRIVE position, and check B.O. drive light for operation. 4. Turn MASTER and main light switches OFF. Does B.O. drive light operate? Replace light switch (para 8-17). CONTINUED ON NEXT PAGE 3-263