TM 10-3930-669-20 2-14.  ELECTRICAL SYSTEM TROUBLESHOOTING (CONT). 4.  TRANSMISSION TEMPERATURE GAUGE GIVES NO OR INCORRECT READING. 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) Jumper Wire 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 All other gauges operate. POSSIBLE PROBLEMS Transmission temperature sensor faulty. Gauge wire 5 faulty. Gauge ground wire faulty. Wire 15 faulty. Transmission temperature gauge faulty. TEST OPTIONS Gauge operation test. REASON FOR QUESTION If suspect gauge reads at full scale, temperature sensor is faulty. ¬ 2-144