Quote:
Originally Posted by kippmw
Hi all. Drove my coupe accross town the other day, probably 50-60 miles total. Even after driving for a while at speed, the ammeter sat at a consistent 9-10 amps charge. It jumped up to 15- 20 amps after cold start, ammeter still sits at 0 when engine is off.. Tested the voltage at the alternator output and the battery while running and got about 7.5 volts, so around expected. The battery seems to be fine...starts the car reliably. Battery didn't seem to be overcharged when I got home. Thoughts? Bad regulator in the alternator?
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Alternators are not designed to go to zero, when the battery is fully charged and there is no demand it will go to its minimum output which is 2 or 3 amps . any draw on the system or if the battery is a little weak will cause the output to increase.
Like was stated above, check connections and grounds.
Check battery voltage after it has set overnight.
Turn lights on and off while running to see if the regulator is calling for more output. Regulator is probably ok.
Bill