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Page Title: 2. HOIST WILL NOT LOWER USING REMOTE CONTROL UNIT
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TM 9-2320-364-20-3 2-2528 2.  HOIST WILL NOT LOWER USING REMOTE CONTROL UNIT. INITIAL SETUP NOTE This problem can occur at the right or left hand remote control connector.  Only the right hand connector is illustrated. 1. Go to Step 2 of this Fault. START YES NO Hoist operates using manual   control lever. At least one other remote   control function operates. Remote control unit harness   faulty. Controller switch faulty. Controller circuit card faulty. Remote control unit cable   faulty. Wire from truck remote control   connector outlet to terminal 16   faulty. Wire from terminal 16 to   solenoid faulty. Solenoid black wire faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Voltage test. STE/ICE-R #89. If component or wire supplying voltage to solenoid is loose, faulty or shorted; 22 to 28 vdc will not be present at solenoid. 2-29.  CRANE 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) References TM 9-2320-364-10 TM 9-4910-571-12&P Equipment Condition Engine OFF, (TM 9-2320-364-10) Parking brake applied, (TM 9-2320-364-10) Wheels chocked, (TM 9-2320-364-10) Remote control unit connected, (TM 9-2320-364-10) Mast fully erected, (TM 9-2320-364-10) Crane outriggers down, (TM 9-2320-364-10) WARNING Are 22 to 28 vdc measured at hoist valve solenoid (outer) harness connector, terminal 1 with crane on and remote control unit HOIST lever in DOWN position? Go to Step 8 of this Fault. Read   WARNING on Page 2-2529

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