Chrysler Repair: 1994 Chrysler LHS 3.5 no spark, no fuel pump, 1994 chrysler lhs, chrysler lhs

Question
Hello,
I have a 1994 Chrysler LHS I am working on (3.5 Engine). I was working on the heating system and

had most of the dash out. After fixing the heating problem and re-installing most of the dash, I

started the engine and it ran fine. I only ran it for about 5-minutes. I turned the engine off

and when I went back to re-start it, the battery was too weak to start the engine (lights were

on). I connected a battery charger and tried to start it and now it will not start. There is no

spark, and the fuel pump does not run. There is also no voltage on the green/orange wire on the

coil harness plug. I cannot find any fuses blown and of the 3 fusable links I found (2 at the

battery cable and one behind the washer bottle that goes to the Alt. output) none of which were

blown. I have changed the PCM, BCM and coil pack with still no luck. I cannot get the check

engine to give me a code by using the "on/off/on/off/on method. When I try this, the check

engine light goes off and stays off. I also connected a snap-on scan tool to the blue connector

under the dash and it says it cannot communicate. There is one 12v + wire in this connector that

is working. Any advice will be greatly appreciated. I keep thinking there is a fuse/fusable link

or main wire somewhere that is bad?  

Answer
Sounds like you've taken the bus out.The bus is the communication line that the modules talk to each other on.I would retrace your steps.Pay close attention to the sides of the instrument panel.Fuse block on 1 side and the bcm on the other.Perhaps a wire is smashed between the side mounts of the dash.Also make sure the wiring at the air bag control module is clear.Make sure the grounds at the center stack are secure.With this system if one module goes down it will take the bus with it.If all of the wiring looks right then start disconnecting modules one at a time to see if the pcm wakes up.I don't think you'll have to go that far.I think that you will find a grounded wire.Let me know.