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Home >> Audi >> 1990 >> 90 Base, 2.3 D, Automatic >> Repair and Diagnosis >> Electrical >> Charging Systems >> Alternator & Regulator >> On-Vehicle Testing >> Alternator Exciter Circuit Test >> Current Checking

Current Checking

Check that battery voltage is a minimum of 12 volts. Charge as needed. Disconnect Blue wire from alternator terminal and connect Multimeter (US 1119 ) between alternator terminal and Blue wire. Set multimeter to 200-mA range. If reading is lower than 150-185 mA, check Blue wire between alternator and instrument panel or replace printed circuit in instrument cluster.