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VOLTAGE TEST - TM-9-2320-364-20-2_675
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TM-9-2320-364-20-2 Truck Tractor Line Haul 52 000 GVWR 6x4 M915A2 Truck Tractor Light Equipment Transporter (Let) Manual
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VOLTAGE TEST - TM-9-2320-364-20-2_677
TM 9-2320-364-20-2 2-1452 34.  ENGINE BRAKE DOES NOT OPERATE IN LOW. INITIAL SETUP 1. Go to Step 3 of this Fault. START YES NO Reverse light operates   indicating 10 to 14 vdc to   wire 1871. Dash lights operate indicating   10 to 14 vdc to circuit   breaker CB7. Engine brake harness faulty. Circuit breaker CB7 faulty. Wire 1712 faulty. Engine brake switch faulty. Wire 1713 faulty. Wire 1711 faulty. Wire 508 faulty. DDEC ECM faulty. TRANS relay R7 faulty. Wire 1839 faulty. Wire 211 faulty. Relay R8 wire 1871 faulty. Wire 213 faulty. ATEC ECU faulty. Retarder relay R8 faulty. Wire 1716 faulty. Circuit breaker CB11 wire 1871   faulty. Wire 1711 faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Voltage test. STE/ICE-R #89. If 10 to 14 vdc are not measured, engine brake will not operate in low. 2-20.  ELECTRICAL SYSTEM TROUBLESHOOTING (CONT). Tools and Special Tools Tool Kit, General Mechanic’s:  Automotive (Item 74, Appendix G) STE/ICE-R (optional) (Item 3, Appendix G) Multimeter (Item 44, Appendix G) Jumperwire Personnel Required Two Equipment Condition Engine OFF, (TM 9-2320-364-10) Parking brake applied, (TM 9-2320-364-10) Wheels chocked, (TM 9-2320-364-10) Top engine access cover opened, (TM 9-2320-364-10) References TM 9-2320-364-10 TM 9-4910-571-12&P Materials/Parts Lockwasher (8) (Item 195, Appendix F) Are 10 to 14 vdc measured on wire 1716 at engine brake harness connector end? WARNING Read   WARNING on Page 2-1453

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