You don't have a digital odometer readout? Every car sold in the U.S. Went to "on-board diagnostics, version 2, (OBD2) starting with 1996 models and that includes three-digit codes, hence the need to display them a different way. On '95 and older model Chrysler products you still cycle the ignition switch three times but then after a few seconds the Check Engine light will turn off, then start blinking the two-digit codes. You count the number of flashes, wait for a short pause, then count the second number of flashes to get the second digit of that first code. After a longer pause the next code will flash the same way. The last code will always be "55" which just means it's done. If you miscounted, just cycle the ignition switch off and back on once and it will repeat the sequence. Cranking the engine will get it out of that test mode.
Looking back at your original post, you're replacing parts all over the place. There was at least one diagnostic fault code stored in the Engine Computer when the Check Engine light turned on a few weeks ago. If you disconnected the battery when you replaced the alternator, that memory was erased and the valuable information was lost. The alternator itself could have been responsible for the light turning on. Worn brushes are real common and cheap to fix. They will cause intermittent loss of charging often for weeks or months before they fail completely. You would have seen the volts gauge on the dash going down. The fault code would have been "alternator field circuit not switching properly". The voltage regulator is inside the Engine Computer and current through it coming from the alternator is monitored. It turns the Check Engine light on because anything that might adversely affect emissions must turn that light on. Low system voltage affects the fuel pressure, injector opening, and spark voltage, any of which can increase emissions.
How are you checking the fuel pump? It should only run for one second after turning on the ignition switch, then it turns on again during engine rotation, (cranking or running). A lot of people get hung up on the first thing they find not working, meaning fuel pump, but you have to look for anything else that is also dead, in this case, spark. If that's missing there's no use looking at the fuel pump.
Tuesday, October 9th, 2012 AT 5:01 AM