TB-9-2320-335-13&P HMMWV Operator and Field Maintenance, Parts, Tools M1151A1 M1152A1 M1165A1 Download
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2-36 TB 9-2320-335-13&P ELECTRONIC SPEEDOMETER SYSTEM DIAGNOSTIC FLOWCHART NO YES 3 TEST OPTIONS MULTIMETER REASON FOR QUESTION No resistance indicates an open wiring harness or sender generator. High resistance indicates a short. Less than 5 ohms indicates continuity. FROM 2 Page 2-56 DOES SENDER GENERATOR CIRCUIT HAVE CONTINUITY? KNOWN INFO SPEEDOMETER INOPERATIVE OTHER GAUGES OPERATE NORMALLY SPEEDOMETER HAS POWER SPEEDOMETER HAS GROUND POSSIBLE PROBLEMS OPEN SHORT SPEEDOMETER SENDER GENERATOR SPEEDOMETER DRIVEN GEAR REPLACE SENDER GENERATOR (Para. 5-17.1) or REPLACE SPEEDOMETER WIRING HARNESS (Para. 4-18.1). REPLACE SPEEDOMETER (Para. 4-17.1). NO YES 4 TEST OPTIONS VISUAL REASON FOR QUESTION Stripped or broken speedometer driven gear will cause sender generator to be inoperative. ARE SPEEDOMETER DRIVE GEARS GOOD? KNOWN INFO SPEEDOMETER INOPERATIVE OTHER GAUGES OPERATE NORMALLY SPEEDOMETER HAS POWER SPEEDOMETER HAS GROUND NO OPEN CIRCUIT POSSIBLE PROBLEMS SPEEDOMETER SPEEDOMETER DRIVEN GEAR REPLACE SPEEDOMETER DRIVEN GEAR (Para. 5-17.2). END OF TEST