Article written by Underhoodservice.com
- One Test Is Not Enough
If only battery voltage is present at the battery on a running engine, does this mean the alternator is “bad?” No, it does not. That only means that the alternator is not charging, but does not reveal why. Therefore, it does not prove a faulty alternator. All too often the alternator is condemned by technicians due to this test alone.
- Look It Up
For some, 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. Still yet, it’s perfectly normal for others to see the alternator not charge at all intermittently. Some alternators are controlled only with an internal or external regulator. Some are controlled only by the PCM. Still yet, others are controlled by a voltage regulator and the PCM. Not knowing what controls what, and how it is supposed to function, can’t cause a misdiagnosis or cause a critical problem to be over looked. Take the time to look at the service information.
Checking your starting system on your vehicle One of the most common problems on vehicles is that they simply will not start. There are several different factors that can affect whether or not your vehicle will start. In this article we will discuss some simple tests that will allow you to test your entire starting system. This will help you save money and do it yourself. Ok, the only real tool that you are going to need to test your starting system is a simple multimeter. You can use a simple multimeter such as this 
Replacing your alternator
Battery Service When it comes to your vehicle the battery is one of the most important items. It not only starts your vehicle but without it the vehicle will not run. Overtime batteries release chemicals and the terminals corrode and can cause a poor connection resulting in a vehicle that will not start or resembles a vehicle with a poor battery. It is simple to clean the posts on a battery. I will describe how to properly clean the posts and maintain your battery to insure that it has the longest life possible. 