hello all !

good day to all.

ride is a toyota corolla xl 2000 ... 2e engine ...

noticed my ride vibrates erratically when aircon & headlights on.

so, had my electricals checked by the neighborhood elec shop ...

after checking voltages with aircon / headlights on, he was quick to offer trade-in for a recon unit instead of repair.


I'm wondering whether our neighborhood auto electrician has made a correct diagnosis. So, i took my digital voltmeter & took the ff readings:

1. idle - aircon off - headlights off - 14.04 volts
2. idle - aircon off - headlights on low beam - 13.16 volts
3. idle - aircon off - headlights on high beam - 12.95 volts
4. idle - aircon on - headlights off - 13.16 volts
5. idle - aircon on - headlights on low beam - 12.25 volts
6 engine off - battery voltage is 12.5 volts

Alternator belt seems ok, not loose. Changed about a year ago.
battery is enduro 2sm ... about 1 year 9 months old.

Have never done any maintenance on the alternator for the past 4 years.

I've read several threads at tsikot. From what i have read, everything seems ok except for #5. Some say its ok. Some say not. A


So, can anyone tell if my alternator is ok or is it in need of repair or replacement ?

Thanks in advance for your replies and advise.