TM  10-3930-638-24&P 2-21.   STARTING   SYSTEM   TROUBLESHOOTING   (cont) MALFUNCTION TEST OR INSPECTION CORRECTIVE  ACTION 2. STARTER FAILS TO CRANK (cont) Step 6. Turn IGNITION switch to OFF and remove key. Connect ohmmeter leads to terminals of 25 ampere circuit breaker  and  note  ohmmeter indication. If  ohmmeter  indicates  more  than 0.1 ohm, replace 25 ampere circuit breaker  (para  2-27b). Step 7. Tag and disconnect wires from START switch located at left of steering column. Connect ohmmeter leads to terminals of START switch, and note ohmmeter indication while depressing START switch. If ohmmeter indicates more than 0.1 ohm, replace START switch (para 2-28 b). 3. STARTER CRANKS CONTINUOUSLY Step 1. Connect voltmeter leads to S terminal of starter solenoid and ground, and turn IGNITION switch to ON. a. If voltmeter indicates zero volts, replace starter assembly (para 2-27a). b. If voltmeter indicates 24 Vdc, proceed to step 2. Step 2. Connect voltmeter leads to terminal 1 of starter relay and ground, and turn IGNITION switch to ON. a. If voltmeter indicates 24 Vdc, replace START switch (para 2-28b). b. If voltmeter does not indicate 24 Vdc, replace starter relay (para 2-27b). 2-22.   CHARGING   SYSTEM   TROUBLESHOOTING MALFUNCTION TEST OR INSPECTION CORRECTIVE  ACTION 1. ABNORMAL ALTERNATOR LIGHT OPERATION Step  1. Place IGNITION switch to OFF. ALTERNATOR light should be off. a. If ALTERNATOR light is off, proceed to step 2. 2-103