Why would a new alternator go bad?
There are a few issues that could make the alternator go bad, such as jump-starting the car the wrong way or installing an accessory that overloads it. Leaking fluid in the alternator or a tight belt can also cause damage to the alternator bearings, causing premature wearing.
What causes alternator to burn out?
Bad diodes are a common cause of alternator failure. Normal driving and charging loads won’t burn out the diodes, but infrequent driving and short trip nighttime driving with lights and other accessories on can increase charging loads and significantly shorten their life.
How long does it take for a new alternator to charge a battery?
Basically, at idle you can probably get 80 amps out of your alternator. You can charge a flat battery to 80 percent full in about 2 hours, so long as you alternator can manage produce around 14 volts at the battery terminals this whole time.
Can a bad ground cause an alternator not to charge?
Poor ground connections are an often-overlooked cause of low charging output and alternator failure. Voltage drops on the positive side of the charging circuit can cause undercharging.
How accurate is AutoZone alternator test?
How accurate is AutoZone alternator test? Before heading to the repair shop, I stopped by AutoZone on my way home. They advised the alternator was toast – confirmed that with the repair shop the next day. Short answer – Yes, they’re accurate.
How does AutoZone test your alternator?
We can do a charging test in the parking lot which tests the battery, and will determine whether or not your system is charging properly. This test may not pinpoint whether the alternator is bad or not, but you can also remove the alternator from your vehicle and have it tested at the nearest AutoZone auto parts store.
Can an auto parts store test your alternator?
Many auto parts stores will test alternators, starters and batteries for free, though you will have to remove the alternator to have it tested at an auto parts store. Once connected to a terminal, an alternator should test between 12 and 13.5 volts.