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Home >> Ford >> 1990 >> Bronco 4.9 Y, Standard, M5OD-R2 >> Repair and Diagnosis >> Electrical >> Charging Systems >> Alternator - Models W/External Regulator >> Circuit Tests >> Current Drain Check

Current Drain Check

Ensure all accessories are turned off. Disconnect either battery cable. Connect a test light between battery cable and battery post. If light does not come on, no current drain exists. If light does come on, check individual circuits to find source of current drain.