TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
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TM 9-2350-311-20-1 (2) REAR B.O. MARKER LIGHTS FAIL TO OPERATE; ALL OTHER LIGHTS OPERATE T OO I S General mechanic’s tool kit (item 64, Appx H) Driver’s instrument panel Multimeters (item 36, Appx H) TA-1 probe kit (item 43, Appx H) 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 E (lead 20/24). 3. Turn MASTER switch ON, apply brake pedal, and check rear B.O. marker lights for operation. I 4. Turn MASTER switch OFF. I Do rear blackout marker lights operate? I Replace light switch (para 8-17) 1. Reconnect bulkhead-to-driver’s instrument panel wiring harness to light switch. 2. Remove inoperative B.O. marker assembly (para 8-25). 3. Place red lead of multimeters in center contact of socket and black lead to ground. 4. Turn MASTER switch ON, place main light switch to B.O. MARKER position, and check for voltage. 5. Turn MASTER and main light switches OFF. Is voltage present? Replace B.O. marker assembly (para 8-22). 1 CONTINUED ON NEXT PAGE 3-261