alternator Archives - Page 2 of 4 - UnderhoodService
WAI Unveils Premium Alternators For Heavy-Duty

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

Diagnostic Strategies For Stop/Start Systems

This function of the power management system that uses several modules to decide when the engine needs to stop and start.

Tech Tip: Alternator And Battery Testing Diagnostic Tips

For some vehicles, it’s normal to see as high as 16 volts for long periods at a time. For others, it’s ­normal to see as low as 13 volts. For some, a constant 13.6 volts is an indication of a problem.

Honda LIN Line Controlled Charging Systems

On older vehicles, the alternator and engine were never really connected. The alternator was internally or externally self-regulated to a voltage, but that was it.

Alternator Pulley Diagnostics

When faced with an illuminated charge light diagnosis on most late-model vehicles, do not automatically assume the problem is inside the alternator and potentially unserviceable.

VIDEO: What Is The Difference Between An OAP And An OAD?

Andrew Markel discusses vibration control alternator pulleys, and the differences between the two most common designs available on the market. Sponsored by Litens.

VIDEO: Ensuring Your Alternator Lasts

Check out this video to learn more ways that you can ensure your new alternator will last longer than ever and that the electrical system will stay up to par. Sponsored by Auto Value and Bumper to Bumper.

VIDEO: How Modules Manage Alternator Power

Andrew Markel discusses power flow through the electrical system on a vehicle, and how the modules help provide the right amount of power to different components. Sponsored by Valeo.

VIDEO: Module Communication Codes? Check The Alternator

Andrew Markel talks about AC voltage and what to test for when module communication codes appear while a vehicle is on the road. Sponsored by Auto Value and Bumper to Bumper.

ac-ripple-voltage-alternator-video-featured
Alternator Testing Tips

If only battery voltage is present at the battery on a running engine, does this mean the alternator is “bad?” No, it does not. It only means that the alternator is not charging, but does not reveal why. Therefore, it does not prove a faulty alternator.

VIDEO: Check Tensioner Health By ‘Minding The Gap’

Andrew Markel goes over tips to visually inspect a belt tensioner, including how to tell if the belt is running uneven. Sponsored by Litens.

tensioner-health-check-video-featured
VIDEO: The Best (And Worst) Ways To Install A Decoupler Pulley

Andrew Markel discusses several installation and removal processes for decoupler pulleys, including which will produce the most reliable results. Sponsored by Litens.

decoupler-pulley-install-remove-video-featured