W250 3/4 Ton Pickup 4WD V8-360 5.9L VIN U 4-bbl (1982)
Starter Motor: Testing and Inspection
Bosch, Mitsubishi & Nippondenso Starters
Diagnosis
Fig. 1 Starter motor diagnosis
Amperage Draw Test
1.
Run engine until it reaches operating temperature, then turn engine off.
2.
Connect a suitable battery-starter tester according to manufacturer's instructions.
3.
Turn battery-starter tester control knob to "OFF" position.
4.
Turn voltmeter selector knob to "16 VOLT" position.