I have a 96 eclipse. Have had it for 2 wks. Battery lite came on. Test showed battery over charging. Result; regulator bad. Replaced altenator. Same thing, battery lite on, test showed faulty altenator. Replaced alt. Again. Battery lite on again. Test shows faulty regulator AGAIN. Could it be possble to get two bad alts. IN A ROW? My brand new battery can't take much more boiling! Do I trust the tests? If not, how do I track down what is really wrong?? Thanx, desperate deb.

OPERATION . .“.
Rotation of the excited field coil generates AC voltage in the stator. This alternating current is then rectified through diodes to produce DC voltage. Refer to the waveform shown in the illustration at left. The average output voltage fluctuates slightly with the generator load condition. When the MFI relay (ASD relay) is on and the control circuit is grounded by the powertrain control module (PCM), current flows to the field coil, initial energization of the field coil. The stator coil starts to generate power after the engine is started. The generator output voltage rises as field current increases and falls as field current decreases. Accordingly, when the battery positive voltage reaches target voltage value, the PCM turns the field current off. When the battery positive voltage is below target value*, the PCM turns the field current on to maintenance generator voltage at a constant level. If the field current is constant, the generator output voltage will increase along with increases in engine speed.
*: The target voltage is programmed in the PCM according to battery temperature.
OPERATION . .“. Rotation of the excited field coil generates AC voltage in the stator. This alternating current is then rectified through diodes to produce DC voltage. Refer to the waveform shown in the illustration at left. The average output voltage fluctuates slightly with the generator load condition. When the MFI relay (ASD relay) is on and the control circuit is grounded by the powertrain control module (PCM), current flows to the field coil, initial energization of the field coil. The stator coil starts to generate power after the engine is started. The generator output voltage rises as field current increases and falls as field current decreases. Accordingly, when the battery positive voltage reaches target voltage value, the PCM turns the field current off. When the battery positive voltage is below target value*, the PCM turns the field current on to maintenance generator voltage at a constant level. If the field current is constant, the generator output voltage will increase along with increases in engine speed. *: The target voltage is programmed in the PCM according to battery temperature. <img src="http://www.freepichosting.com/image/327195-alt.png"/>

the 4g63(2.0 turbo) and 4g64(2.4 non-turbo) have a voltage regulator in the alternator.

the pic to go along with the OPERATION material i just posted didn't show. here is the link to the pichttp://www.freepichosting.com/share/3271... the 4g63(2.0 turbo) and 4g64(2.4 non-turbo) have a voltage regulator in the alternator. the pic to go along with the OPERATION material i just posted didn't show. here is the link to the pic http://www.freepichosting.com/share/327195-alt.png