Chrysler Repair: 99 2.5 V-6, no start. How to get fault codes?, digital voltmeter, center conductors

Question
I'm working on a 99 Sebring 2.5 L V6.  It was running fine until one day when it just would not start.  The oil light on the dash turned on so I checked the oil level and it was fine.  I am guessing that a sensor went out on it.  How would I check for this with out a scanner (or is there no other way)?

Answer
Hi John,
The manual does not offer a way to do a self-readout, but I read that if your odometer has a trip and reset button you might get a self-readout as follows. Insert key in ignition switch. Press and hold both the trip and reset buttons, turn the ignition to ACC position. Count to 5, release both buttons. Press and release trip button then see if codes appear instead of trip mileage. If you aren't getting spark (check for that to begin the diagnosis) then I would suspect the crank or cam sensor is not working. Those have the fault code 0320 and 0340, respectively.
If you can't get the codes, and you have no spark, then you can test the sensors with a digital voltmeter and a couple of straight pins to probe thru the signal and ground wires to reach the center conductors. The wire colors for the crank and cam are: gray/black, black/light blue and tan/yellow, black/light blue, respectively.
Just put the voltmeter leads between the two wires and switch the ignition to the RUN position. Then crank the engine by hand with a socket and handle/ratchet and observe whether the voltage varies from 5V to 0.3V several times for each full revolution of the crank. If not, then that sensor has failed. The crank sensor looks at the flex plate at the rear end of the engine, while the cam sensor is in the distributor and so you get to the wires at the 6-pin plug for that. The orange and/or orange/white wires of the sensors carry the bias voltage of 8V and that should also be present.
Please let me know what you learn.
Roland