Unfortunately, this will be hard to prove, but the BCM problem may now be a PCM(main computer) problem, this controls the charge rate of the alternator. That, or the wiring in the charging system is in need of repair, Could be battery cables need replacing, or at least a clean and tighten of both ends of both cables. Bad battery negative terminal(ground) connection may be the problem. Try this and post any codes that cone up.
Turn the key from off to on three times, on the fourth one leave it in the on position, count the flasshes.22 would flash as 2 blinks, then a short puase, then 2 more blinks. If several codes are stored, the pause is longer between codes, code 55 will be the last code. Do this and post all codes found.
Some Chrysler work like this:
You can try a self-diagnostic test. To activate self diagnostic program:
With the ignition switch in the OFF position, depress the TRIP and RESET buttons.
While holding the TRIP and RESET button turn the ignition switch to the ON position.
Continue to hold the TRIP and RESET buttons until the word CODE appears in the odometer windows (about five seconds ) then release the buttons. If a problem exists, the system will display Diagnostic Trouble Codes (DTC's). If no problem exists, the code 999 (End Test) will momentarily appear.
Thursday, August 12th, 2010 AT 4:15 PM