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Did you have any additional electronics installed? check alternator capacity against 100% electrical load including installed electronics like upgraded car stereo, ACU. the alternator should supply all the electrical requirement that you need including the engine. If not, upgrade to a higher rated alternator.
Was not like that before you had the alternator installed so I would have who ever installed the alternator go over everything they did because something is messed up with the wiring. Could be nada more than some disconnected wires.
your alternator is still under warranty get a new one, based on your info thats the problem, just make sure when installing the new one the battery polarity is correct because that is one cause of damaging the alternator, reversed polarity will burn regulator ic, once you have installed the new alternator run the engine on idle remove one of the battery connector if the engine still run it means the alternator is charging, if engine stops check wiring connection
CHECK ALTERNATOR FUSE AND FUSE LINK ALTERNATOR NOT GETTING NO POWER FROM BATTERY.ALSO CHECK ALTERNATOR WIRES CONNECTORS FOR DAMAGE OR BROKE WIRES IN THE ALTERNATOR ELECTRICAL CONNECTORS. I HAD SAME PROBLEM WITH CHEVROLET THE VOLTAGE REGULATOR WIRES CAME OUT THE CONNECTOR I HAD TO BUY NEW CONNECTOR CRIMP IT SOLDER THEN SEAL IT WITH ELECTRICAL TAPE IF FUSE AND FUSE LINK OKAY MORE LIKELY YOU HAVE DAMAGED WIRES AT CONNECTOR MAKE SURE DRIVE BELT TIGHT AND NOT SLIPPING.
REPLACE BATTERY CABLES IF OLD AS VECHICLE.CHECK FOR BROKEN BATTERY FEED WIRE OR VOLTAGE REGULATOR WIRES TO ALTERNATOR.CHECK FUSE LINK FROM STARTER TO ALTERNATOR SEE IF ALTERNATOR BATTERY FEED WIRE HAS POWER IF NOT FUSE LINK BLOWN..AND CHECK ALTERNATOR FUSE.
You will need an allen key with multiple sized fitments to turn the tension-er to loosen it such that the new belt can be installed and thern turn the bolt the other way and try to keep a track of how many turns you have to make to return to the original position to maintain the timing of the engine.....................sodeep
Depends on which engine if it's the 2,2 engine fairly easy but the 2.4 is a big job Timing Cover & Exhaust Manifold Removal Required. With the 2.2 locate water pump loosen the bolts on the pulley then remove the serpentine belt. Finish removing the pulley bolts now you can get at the water pump bolts. Use a container under the car to catch the antifreeze. Remove the water pump from the engine, installing new pump in reverse order to removal.
check the alternator it supplies juice to the battery while running all the electrical needs for your car if your alternator is fine you might have a dead cell in your battery.take it to an auto supply store and have it checked out usually it's free.