Load Test

Start engine and turn headlights on high beam and heater control on "HI". Run engine at 2000 RPM and check amperage. Ammeter should read more than 20 amps on Pickup models, or 30 amps on all other models. If reading is less, repair alternator.

NOTE: If reading is low due to a fully charged battery, it may be necessary to crank engine with coil disconnected for about 15 seconds to discharge battery.