TM 10-3930-671-24 2. Disc Contact Test a) Turn the analyzer function switch to the volt-drop scale. b) On the starter solenoid, connect the positive (+) analyzer cable to the solenoid "Battery"  terminal post  and  the  negative  (-)  analyzer  cable  to  the solenoid motor terminal post. c) Turn  ignition  key  switch  to  the  START  position and crank the engine for 15 seconds, maximum. Turn key switch OFF. Diagnosis   of   results:   While   cranking   the   engine,   a voltmeter     reading     higher     than     0.2     volts     indicates excessive resistance within the solenoid switch assembly.    For  example,   the   solenoid   disc   contact   is good  if  the  voltage  is  0.1-0.2  volts.    The  solenoid  disc contact is faulty if the voltage is 0.21-0.55  volts.    Check and clean or repair the solenoid switch contact disc and terminals. Starter Solenoid Volt Drop Test 1. Turn the analyzer function switch to the volt-drop scale. 2. On the starter solenoid, connect the positive (+) analyzer cable to the solenoid "Battery"  terminal post  and  the  negative  (-)  analyzer  cable  to  the solenoid terminal post. 3. Turn  ignition  key  switch  to  the  START  position and crank the engine for 15 seconds, maximum. Check  the  voltmeter  reading.    Turn  key  switch OFF. F-308