Computer Issues or Not?
 

My girl has slowly been racking up strange little quirks. To start her gas mileage has plummetted quite drastically, previously she got damn good highway gas miles (around 27 ish), now I am lucky if she gets 10-15. When I turn the wipers on, or off it takes them about 2 minutes to actually do either. My turning signal indicator lights inside the cab have begun to randomly not flicker when i have my signals on, but the signals are all working. And my car alarm has stopped 'beeping' when i turn it on and off, it only flicks the lights now, though it does engage.

I had the computer in this car replaced not even 3 years ago, does this sound like a computer issue or just a total electrical melt down?

Sounds like the main power wire(s) may be coming loose. Check both battery wires at both ends.