Output Test

1. Connect Rotunda VAT-40 078-00005, or equivalent, leads to vehicle and turn all accessories OFF.
2. Turn ignition switch ON and read discharge rate on ammeter.
3. Start engine and run at 2500-3000 RPM.
4. Slowly increase load control knob on VAT-40 until highest amp reading is obtained, then turn load control knob OFF.
5. Add discharge rate to highest amp reading for total alternator output.
6. Alternator is functioning properly if total alternator output is more than minimum specified. Specifications
7. If amperage is below minimum specification, refer to Voltage Test. Voltage Test