TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 167 of 890
TM 9-2320-280-20-1 KNOWN INFO POSSIBLE PROBLEMS DIAGNOSTIC FLOWCHART TEST OPTIONS REASON FOR QUESTION KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION NO YES NO YES ELECTRICAL 2-80 Change 1 IS THERE AN OPEN CIRCUIT FROM PIN B TO PIN R AND FROM PIN B TO PIN S ON THE ROTARY SWITCH (WITH THE SWITCH IN THE "STOP" POSITION)? IS THERE ABOUT 0 VOLTS AT PINS A,B,D,G AND H OF THE PCB/DISTRIBUTION BOX BODY CONNECTOR? REPAIR OR REPLACE THE BODY CONNECTOR HARNESS. GO TO A2, PAGE 2-78, TO CONTINUE TESTING. B1 B2 B3 B FROM A1, Page 2-78 REPLACE ROTARY SWITCH REPLACE PCB/DISTRIBUTIION BOX SHORT ON BODY CONNECTOR SIDE OF PCB/DISTRIBUTION BOX ROTARY SWITCH PCB/DISTRIBUTION BOX BODY CONNECTOR BODY CONNECTOR CABLE HARNESS 1. STE/ICE-R TEST 91 (Page 2-752) 2. MULTIMETER Checking the rotary switch first makes it easier to check the other possible problems. ROTARY SWITCH OK PCB/DISTRIBUTION BOX BODY CONNECTOR BODY CONNECTOR CABLE HARNESS 1. STE/ICE-R TEST 89 (Page 2-750) 2. MULTIMETER If there is voltage at any of these pins then the PCB/distribution box must have a short in it.