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This is also posted in the Gen 7 forum.

Greetings -
I have an 01 EX coupe with 112,000 miles. Here are the symptoms:

1. While driving, instrument panel and radio will cease operation.
2. After varying amounts of time (10 seconds to a few minutes) they will begin operating again. The ABS light sometimes comes on.
3. Aux power source (lighter) will sometimes remain operating.
4. Sometimes the fan will slow down or stop running.
5. Engine operation never seems to be an issue - just the devices specified.
6. Once (today) the car would not turn over. Got it started with a jump and made it home.

Once home, I checked alternator output and the battery.
1. Voltage at the battery with the engine running was 13.7 (cooling fan) and 13.3 (fan on).
2. The battery is of an unknown age (the date punches on it are all intact). I have had the car for 4 years. (I know - the battery is certain to be ready for a replacement.)
3. Specific gravity floats 2 ***** in all 6 cells.
4. I currently have it charging at 12 amps.

My initial feeling was the alternator but I do not have any dash indication of a failure.
Would a bad battery alone cause these problems?
Is there a possible transiant problem with the alternator?
Anything else that might be causing this?

Thanx

 
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i have the exact same problem with em 2001 DX, i thought it was a battery issue, i changed it but still the battery light wont turn off. so im kind of sure now that its the alternator. is there any DIY how to change it ??

 
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The verdict is in - Voltage regulator.

Final cost - $130 installed, not by me but by Fast Eddy's in Andrews, NC. I used Eddy in the past to build a HO alternator for my Typhoon. A rare combination of a smart and honest repair shop.

 
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I had this exact same problem in my 01 EX Coupe! It was about a month ago and it turned out to be the same thing, the voltage regulator in the alternator. I replaced the alternator, problem solved. However, now the battery light is on again and they had to replace the alternator again. They did so (under warranty thank god) and everything is checking out alright except that battery light won't turn off. Any body else still having that problem?

 
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My fix is holding with no more issues.

 
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My issue ended up being with the ECM. Within a day or two after I posted this I went to get on the highway and while I Was trying to accelerate the car all of a sudden decided to stop moving. I ended up having it towed the 30 miles back home and the guys at my shop took a look at it and figured out the ECM was gone. Hope this can help somebody else in the future!