Make sure all terminals are clean, both at the battery and at the alternator. This would be the first and cheapest thing to check. Also, if the alternator was remanufactured, it may be defective. If the battery won't charge properly, I would think it's the alternator.
Battery not charging
Hello, I have an '03 eclipse, and I am having some electrical problems that I can't figure out. I noticed that my headlights and dash lights were flickering (getting dimmer and brighter). I went to autozone, and they said my battery wasn't being charged. Also, they said that the alternator was getting too hot. I had recently replaced the battery and alternator. I took the alternator off the car and had it tested at autozone, but it passed. Does anyone have any idea why the battery wouldn't be charging when the alt and the battery are both good? Any suggestions would be appreciated.
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I had a 86 z28 with same problem. Of course I checked and replaced alternator, battery, and terminals. After car was good for a day or 2 than the problem came back. Then my neighbor told me to test the starter and it was bad. He said if the starter is bad it will pull more juice to spin it. Try testing the starter.
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Leatglue, as I said in the original posting, I had the alternator checked and it is all right. Does anyone think it could be a wiring problem, or a part that's drawing too much current?
Is this flickering occurring while you drive along? Does the flicker frequency increase and decrease with engine rpm? Are you having to jump the car off? Does this only occur when the A/C-Defroster is on? Is your alternator belt loose / squealing?
always start with the easiest first. As fclass said check the alternator belt to make sure it has the correct tension, then check your electrical connections to make sure they are clean and tight. If everything there checks out, move on to the components themselves
The flickering occurs both at idle and while driving, and even with the headlights off, I can still see the dash flickering. The belt is tensioned and the connections look good. I haven't had to jump the car yet, but with the battery being so low and apparently not recharging, I imagine it's only a matter of time.
The rectifier / voltage regulator in your new autozone alternator is probably crap. Take it back and get another, or get money back to apply towards an oem. I have not had good results with autozone electrical parts in the past. If it flickers only when air conditioner or defroster is selected it may be compressor clutch shorted. WTH unplug ac compressor see if flickering stops.
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