Alternator Service Archives - UnderhoodService
Alternators and Ripple Voltage

The alternator produces an AC current that must be converted into DC current by way of a rectifier.

Battery Charging and Diagnostics

Here are six tips to use when diagnosing a vehicle with a dead battery. 

VIDEO: What Wears Inside A Decoupler Pulley?

We show you what’s inside both OAP and OAD decoupler pulleys. This video is sponsored by Litens.

WAI Unveils Premium Alternators For Heavy-Duty

Company provides immediate access to the most complete new heavy-duty offering available.

Alternator Ripple Testing: The Ghost In The Machine

Before computers and networks in vehicles, an alternator that was producing AC voltage or ripple through the electrical system would cause flickering lights and maybe an ignition problem. Today, excessive ripple voltage can cause communication issues with networks and communication DTCs in multiple modules.