Change 1 2-197
Cracks, glaze, and frays indicate worn belts, which should
be replaced (para. 3-81, all except M1123 and "A2"
vehicles) (para. 3-83, M1123 and "A2" vehicles). Use a
belt tension gauge to determine if the belts need to be
tightened, refer to (para 3-82, all except M1123 and "A2"
BAD CONNECTIONS ARE THE
MOST COMMON PROBLEM !
Sometimes just disconnecting, cleaning, and
reconnecting will solve a problem. BE THOROUGH!
The time you save may be your own.
Refer to the functional flow schematic and check the
1. BATTERY - make sure all connections are clean
and tight, including the shunt and power stud.
2. STARTER - check the high current (heavy gauge
wire 6A) wire at the starter. Don't just check for
voltage; a loose connection will have voltage but can't
carry much current.
3. PCB/DISTRIBUTION BOX
INTERLEAVE TESTS 67 AND 89
BATTERY VOLTAGE AND DC VOLTAGE
USE CONTROL FUNCTION 06 TO INTERLEAVE
TESTS ON THE STE/ICE-R. DIAL 06, PRESS
THE TEST BUTTON. WHEN PROMPTED BY
THE VTM, DIAL IN TEST 67 AND PRESS THE
BUTTON. WHEN PROMPTED AGAIN, DIAL IN
TEST 89 AND PRESS THE BUTTON. VTM
WILL DISPLAY RESULT FOR TEST 67,
THEN 89 THEN 6789, AND THEN REPEAT.
SEE TM 9-4910-571-12&P
FOR MORE INFORMATION.
Disconnect negative battery cable before
disconnecting and reconnecting PCB/distribution
There is battery voltage at the PCB/distribution
box at all times. Failure to disconnect battery
cable will result in damage to equipment or
injury to personnel.
Unscrew BOTH connectors and look for bent or
broken pins, pins pushed out of their socket, or dirt
and corrosion in the connections.