TM 10-3930-669-20 2-14.  ELECTRICAL SYSTEM TROUBLESHOOTING (CONT). 5.  ALL GAUGES DO NOT OPERATE. INITIAL SETUP Tools and Special Tools Tool Kit, General Mechanic's: Automotive (Item 1, Appendix B) Multimeter (Item 2, Appendix B) STE/ICE-R (Optional) (Item 14, Appendix B) References TM 10-3930-669-10 Equipment Condition Engine OFF (TM 10-3930-669-10) MAIN POWER switch OFF (TM 10-3930-669-10) Parking brake applied (TM 10-3930-669-10) Wheels chocked (TM 10-3930-669-10) KNOWN INFO 24 vdc circuits operate. POSSIBLE PROBLEMS Fuse 7 faulty. Wire 5 faulty. TEST OPTIONS Visual test. REASON FOR QUESTION If element is broken, fuse 7 is faulty.  If fuse 7 is OK, wire 5 is faulty. ¬ 2-150