On Car Test
- Disconnect battery cables and install cutout switch, variable resistance, ammeter and voltmeter as shown. Connect ground cable and check that cutout switch is in closed position.
- Start engine and run at test RPM. Adjust variable resistance to give amperage readings as follows: Type 1 and models with air conditioning - 45 Amps, Type 2 - 30 Amps, other VW's without air conditioning and Audi Fox - 25 Amps. Open battery cutout switch, separating battery from test circuit. Load current is now determined by variable resistance.
- Readjust variable resistance to provide Test Output Amperage. Voltage should be as specified.NOTE: Never run alternator without battery connected unless variable resistor is installed to provide load. Alternator or regulator or both could be severely damaged without providing current load.