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Low charging voltage is a symptom of an excessive current demand by the vehicle’s electrical system. With no current demand (load), this alternator will regulate to 14-14.3 volts. If your voltage reads lower, examine the table below. ALTERNATOR HARNESS PLUG VOLTAGE CHECK Before starting vehicle, CHECK FOR SYSTEM VOLTAGE ON THE
ALTERNATOR HARNESS! This is done as follows: 1. With the two-wire harness unplugged from alternator, turn ignition key on, but do not start vehicle. 2. Using handheld voltmeter (set to 25v DC Range), touch positive test lead to one terminal of the harness plug, and the negative test lead to ground. You should read system voltage (12 to 12.5v DC). Repeat test on second terminal of this harness. CURRENT DRAIN TESTING, 1. Turn off engine and everything on the car that uses current. 2. Disconnect the negative (-) battery cable from the battery. ALTERNATOR BELT TENSION, 1. Inspect for cracks, fraying, wear and oil adhesion. Replace if necessary. The
belts should not touch the bottom of the pulley groove. 2. Check drive belt deflection by pushing midway between pulleys. 3. Adjust if belt deflection exceeds the limit.
Tags : negative battery cable, dc range, belt tension, system voltage, test lead, negative test, current 2, wire harness, alternator, voltmeter, deflection, electrical system, pulley, volts, unplugged
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