Chrysler Repair: 1996 concorde no spark, jumper wire, fuse box

Question
Roland

Thanks again for the info,
I completed the task both with the relay in place and with a jumper wire
pin 46 has 11.98 volts pos
pin 20 has 9.86 volts pos

I did not crank the engine to see if any changes


Steven

Answer
Hi Steven,
If you have those pcm power voltages when you are cranking it and with the jumper wire as well in place (check that) and you still get no spark, then about all I can conclude is that the pcm is no good.  For if you have inputs from the sensors, 12V on the coil pack, power to the pcm, and still no pulsing on the black/white/red wires  which you have verified are patent then you should get spark. The last possibility is that the coil pack body is not grounded (simply tightly mounted on metal) or there is a short in the coil pack between the 12v input and each of the coils. Did you check the primary resistances between the 12V input pin and each of the other three pins? It should be about 0.7 ohms? Also check that the resisances between the paired spark towers is somewhere between 8 and 15 thousand ohms.
Beyond that, I am without any further suggestions.
Roland
PS: The 9.86 on pin 20 is strange as it comes from the PTC #1 underdash fuse box which should have 12V on it too, but there are several other fuses in parallel so that may explain the voltage drop. It probably wouldn't affect the function of the PCM. Have you checked for fault codes using the under dash plug-in socket? Maybe a free readout at Autozone parts store will tell you something (like a bad pcm?).