TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
Page 402 of 1205
TM 9-2320-387-24-l INSTRUMENTS CIRCUIT1 &SD TEsT om,elAGNOSW FLOWCHART I r KNOWN INFO I TRY IT. WIRING OK POSSIBLE PROBLEMS’ GAUGE SENDING UNIT L KNOWN INFO WIRING OK POSSIBLE PROBLEMS GAUGE SENDING UNIT RECONNECT WIRES 27G AND 33A AT THE TEMPERATURE GAUGE. WITH THE ROTARY SWITCH IN THE RUN POSITION, DOES THE GAUGE READ OFF SCALE BELOW 120°F (49”C)? REASON FOR QUESTlON This will determine if the gauge can respond to an input signal. 1 TEST OPTIONS WITH THE ROTARY SWITCH IN THE RUN POSITION, SHORT WIRE 338 TO ENGINE GROUND. DOES THE GAUGE READ OFF SCALE ABOVE 240°F (116” C)? TRY IT. REASON FOR OUESllON Thii will determine if the gauge can respond to an input signal. TEMPERATURE 2-348