Check all fuses are good. Use a voltmeter, put neg lead onto battery neg terminal and put voltmeter positive lead to B+ terminal on alternator (large nut terminal) you should get a reading above 13.5 volts with engine at idle, if not the alterantor is bad. Chargeing is controlled by the PCM (computer) on this vehicle, keep your fingers crossed you have not damaged this !
The amount of amperage produced by the generator is controlled by Electronic Voltage Regulator (EVR) circuitry within the PCM. EVR circuity is connected in series with the generator field driver terminal and ground. A Battery Temperature Sensor (BTS), located within PCM, is used to sense battery temperature. Sensed battery temperature and data from monitored line voltage is used by PCM to adjust battery charging rate. This is accomplished by cycling the ground path to control the strength of generator rotor magnetic field. PCM then compensates and regulates generator amperage output accordingly. The PCM monitors critical input to control fuel injection, ignition, emission and other engine management functions. The PCM is also programmed to monitor charging system related circuits.
Battery feed to PCM.
Generator field control.
Battery charging voltage (high & low).
If a problem is sensed in a monitored circuit, a Diagnostic Trouble Code (DTC) will be stored in PCM memory and Malfunction Indicator Light (MIL) will illuminate, provided specific criteria have been met. DTCs can be read using MIL or Chrysler's Diagnostic Readout Box (DRB-III).
Wednesday, September 29th, 2010 AT 3:50 AM