TM-9-2350-256-20-1

RECOVERY VEHICLE, FULL TRACKED: MEDIUM, M88A1

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL VOLUME 1 OF 2

NOVEMBER 2005

TM-9-2350-256-20-1 - Page 444 of 948

TM 9-2350-256-20-1

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Troubleshooting Procedure

Driver’s Periscope

Symptom

Driver’s periscope malfunctioning.

Malfunction

B.O. receiver lamp fails to light but driver’s periscope operates.

Do step 1.

Driver’s periscope fails to operate.

Do steps 3 thru 7.

Both lamp and driver’s periscope fail to operate. Do steps 6 thru 7.

CORRECTIVE ACTION

WARNING

Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry contacts a metal surface a direct

short may result in instant heating of tools, damage to equipment, and injury or death to personnel.

1.

Remove B.O. receiver indicator lamp from socket. Place red lead of multimeter in socket and black

lead to ground. Turn MASTER switch on and check for voltage. Turn MASTER switch OFF. If voltage

is present, replace lamp (see WP 0164 00). If voltage is not present, go to step 2.

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