Alternator Testing

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Simple Answers from Pro Muffler & Brake Shop:
My battery keeps going dead. I had it tested and it is fine – what could be the problem?

Pro Muffler & Brake Shop Answer:
Well, your problem could be caused by several things. Let’s start with a likely suspect: your alternator. The alternator is like a little electrical generator. It is spun by the serpentine belt on your engine and makes electricity. This electricity is used to power the vital electrical systems required to run your auto. It also powers all of your electronic accessories like your stereo, navigation, heated seats, and air fans, as well as charging all the electronics you have plugged in.

After the alternator has completed all that, any electricity that’s left over is used to charge your battery. You can see where we’re going: if the battery isn’t getting enough electricity to stay charged the problem may have something to do with the alternator.

Now it could be that the alternator is bad – they do wear out over time. There are a number of failure points within the alternator, but in practice, it is less pricey to simply replace the alternator than to take it apart and repair it.

At Pro Muffler & Brake Shop in Benton Harbor, we can test your alternator to see if it needs to be replaced. We find that typically the alternator tests out as being OK – but for some other reason it’s not putting out enough electricity to keep the battery charged. Remember we said that the serpentine belt drives the alternator? Well the problem can often lie with the serpentine belt system.

The serpentine belt transfers power from the engine to the alternator. When the belt wears away to a certain point, it is no longer able to provide enough grip and the belt can slip on the alternator pulley so that it is not spinning fast enough to generate all the electricity that your auto needs.

A possible related problem for Benton Harbor drivers is a worn serpentine belt tensioner pulley. This pulley provides tension on the serpentine belt so that it is tight enough to spin the alternator and other accessories. When the belt is too loose, it can slip on the alternator pulley and, once again, not enough electricity is made.

So, when you battery is going dead – test it. If the battery is still good – test the alternator. If the alternator is still good – inspect the serpentine belt and belt tensioner. Chances are good that your service center or the team of friendly & knowledgeable service professionals at Pro Muffler & Brake Shop will get to the root of your trouble.

Give us a call

Pro Muffler & Brake Shop
2094 South M-139
Benton Harbor, Michigan 49022
269.926.2006

http://promufflerandbrake.com/

Kevin & Pro Muffler guys, “Many thanks for your prompt, courteous & special service today!Anita
Thank you Pro Muffler & Brake Shop! If I have a problem with my brakes or my muffler again, I will come to you! Many thanks to you & staff. My car runs so much better and because of you guys I have confidence in driving my car. Customer of '97 Honda Civic
Dear Kevin & Rich,We finally made it to the West Coast. We’re in Northern California headed down to San Fran. We picked up my PT Cruiser and it’s holding up well… So far. I don’t want to jinx myself. Hope all is well in Michigan. Perhaps we’ll meet again. Thanks for all your kindness!Sincerely, Beth & Jerod
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