TM 10-3930-671-24 6. Be    sure    battery    negative    (ground)    cable    is securely    connected    to    engine    block.    Check engine starter cable connections. 7. Start the engine. 8. With   engine   running,   look   at    battery    charge indicator.    The  light  should  not  be  illuminated, indicating voltage output from the alternator. 9. Check    fuel    gauge    to    be    sure    fuel    level    is adequate,  to  ensure  that  low  fuel  level  will  not affect other tests of engine performance. Cranking Test 10. If   there   is   indication   of   a   faulty   battery,   or   if engine    cranking    speed    is    slow,    perform    a cranking test, as follows: a) Disable the fuel injection system. Disconnect  the  electrical  power  wire  from the  fuel  shut-off  solenoid  terminal  of  the injector pump. b) Then,    connect    a    voltmeter    across    the battery terminals. Crank the engine for 15 seconds. c) During cranking the battery voltage should exceed  9.6  volts.  Battery  voltage  of  less than  9.4  9.6  volts  indicates  trouble  in  the battery, cables, or starter. d) Immediately after cranking, battery no load voltage should be 12 volts, minimum. The voltmeter should show a quick response. If the   voltage   is   less   than   12   volts   or   the voltmeter has a sluggish response, it is an indication of a battery problem. e) If   battery   no-load   voltage   returns   to   12 volts  immediately  after  cranking  but  there is  low  cranking  voltage  (e.g.,  8  volts),  the problem  is  in  the  cables  or  starter.  First, inspect     the     cables     for     loose     burned terminal  connections.    Then,  remove  and check  the  starter.    Rebuild  or  replace,  as required. f) Connect  the  electrical  power  wire  to  the fuel    shut-off    solenoid    terminal    of    the injector   pump   and   start   and   accelerate engine  to  a  steady  speed  of  1800  2000 rpm. g) Charging system output voltage should be between 12.5 13.5 volts. F-75