DRIVER'S PERISCOPE (cont) - TM-9-2350-256-20

DRIVER'S PERISCOPE (cont) - TM-9-2350-256-20_319

TM-9-2350-256-20 Carrier Cargo Tracked 6-Ton M548A1 (2350-01-096-9356) M548A3 2350-01-369-6081 Manual
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CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS TM 9-2350-256-20 2-19 ELECTRICAL TROUBLESHOOTING-Continued DRIVER'S PERISCOPE-Continued 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. A 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 paragraph 6-15). If voltage is not present, go to step B. B Disconnect wire 516 from B.O. receiver lamp. Place red lead of multimeter in wire 516 and check for voltage. If voltage is present, replace lamp socket (see paragraph 6-29). If voltage is not present, repair/replace wire 516 of switch panel to gage panel and miscellaneous switches wiring harness (see paragraph 6-56). C Remove infrared power supply to driver's periscope lead assembly from driver's periscope. Place red lead of multimeter in wire 517 and black lead to ground. Turn MASTER and B.O. RECEIVER switches on and check for voltage. Turn MASTER and B.O. RECEIVER switches OFF. If voltage is present, notify Direct Support Maintenance. If voltage is not present, go to step D. 2-250

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