Plymouth Breeze Questions

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Hello, here is my list of symptoms that I suspect can be caused by a faulty PCM but I'm no expert.
It all started when the battery light came on. After going to AdvancedAutoParts to check it out, the diagnostic was a bad regulator.
So I replaced the alternator, and later discovered that the regulator for this car was built in the PCM. (is that correct?)
After that I had a serie of electric wonder.

- the rear defroster came on and off randomly. I replaced the relay but it still did it. So I removed the relay becaused it's annoying.
- The speed of the intermittent wipers varies on their own. When set in one position, they can wipe 1 every 2 seconds, then 1 every 6, then continuous for 5 seconds, then every 3 seconds..
- There is a random damper sound closing and opening from center of the dashboard.
- When the ignition is on but engine off the radio is randomly scrambled but is fine when the engine is on.
- The cruise control works for 30 seconds then stops. The light on the dash stays on but that's it. If I turn the engine off and on again, it works again for another 30 seconds then stops.
- The auto power window goes down for seconds then stops. Push the button again and goes down for 2 seconds then stop...
- The engine has random jerks. I could be on the highway and the the ignition cuts of for a split second then it's fine.
- All the dash instrument would randomly drop very slighly just like they all lost power then come back on.
- The tachometer and miles display would lose power and come back on randomly.
- When I start up the car for the first time it would always stall once within 1 minute from starting up.
- The idle sometimes drops to the point it might stall but goes back to regular idle.
- The lights are flickering (dome light, headlights and dash LCD)

I think that's about all problems I have.
I pulled some codes P0700 and P0740 back in July.
The car has 244,000 miles.
So, is it sign of a bad PCM?
Thank you.
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