1999 Dodge Caravan will not start

MILESTONETAXI

MEMBER
1999 DODGE CARAVAN
6 CYL
FWD
AUTOMATIC
170,000 MILES

Cars runs 24 hrs most days, and they run hot and this problem has popped up on now three different cars, its starts with the alt or batt light on in dash, then car dies from no charge, then I replace alt, then car runs for short time then stalls and ext shutdown relay buzzes in fuse panel, have sent one to a local dealer but looking to do my home work, wondering if the batterys are weak and over worked then maybe causing problems with the computer?

1 Reply

KHLOW2008

MECHANIC
41,815 POSTS

Hi milestonetaxi,

Thank you for the donation.

You need to test/check charging voltage.
Electronic Voltage Regulator (EVR) is built into PCM and if EVR circuit is faulty, the PCM has to be replaced.

TROUBLE SHOOTING
INITIAL CHECKS
Before proceeding with charging system diagnosis, ensure following conditions are met: � � �

Battery is fully charged and in good condition. � � � Battery cables are in good condition with connections clean and secure. � � �
Generator belt is in good condition and properly tightened. � � �
Generator and PCM wiring harness connections are clean and tight. � � �
Engine ground strap is in place.

UNSTEADY OR LOW CHARGING
Check for loose generator belt, charging resistance too high, defective generator, loose generator ground wire, corroded battery terminals or faulty generator.

OVERCHARGING
Check for grounded generator field wiring or faulty generator.

GENERATOR & REGULATOR -1999 Dodge Caravan