Related Photo Galleries
Once the alternator is bolted in place and charging, you can do a quick test of the charging system to ensure the charging harness is as efficient as your new alternator. With the engine running and the charging system working, read the voltage at the back of the alternator, then compare that with the voltage reading at the battery. If the voltage at the battery drops more than 0.40 volt, it’s usually because the charging wire is too small or there is resistance in the circuit. Our CS130D-charged Orange Peel Chevelle measured an acceptable 0.15-volt difference.