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.