My car doesn't seem to start., Please Help Options

[Eazy6G]

Hey guys, I've been trying to figure out why my car won't start for a few days now. I first came to realize it had a problem when I was driving in on the freeway and made my way to the lane right of me. When I did that the car just shut off completely lights and all. Tried turning it back on nothing. Open the hood and realized the battery cablel was loose and since I was close to my house already and didn't have tools to tighten it I just put it back and it turned on and drove off. Left it parked.

Next day I decide to take it out, I opened all the windows and sunroof (since it was hot) and open the hood to tighten the battery down and thats where the problems started. I tighten it fully but it wouldn't start nor would any lights go on (dash board or any lights). But if I would turn the negative cable to a certain side you would hear things go on. If i tighten it, it would go back to sending no current. You would only hear things go back on if i held onto the cable at that exact angle, if i slightly moved it, nothing would happen. And when I tighten it at one point it threw a whole bunch of sparks.

So here's the deal, I need to move this car, and all my windows are stuck open.

I have changed -

- Battery Terminals
-Fuses 100a, 60a, and either a 50a or a 40a. ( don't remember what they are right now, but i know one was for the alternator)
- Checked the other fuses and all seemed good
-Battery is new, and I tested the battery of another car as well and no luck

What should I check now? Are there any fuses that I might have skipped over and should double check? Could it be the alternator? Maybe the cables have gone bad?

Please help guys, I've tried the best I can but I know very little about this sort of stuff. Thank you ahead of time and appreciated.

and if it helps at all, I drive an 96 ST model.

This post has been edited by Eazy6G: Jun 20, 2011 - 4:58 AM

[Eazy6G]

Thanks alot for the respond. I'll give that a look once I head out in a bit. The timing belt could cause the car to not turn on electronics as well? I mean say I put it on the "On" position, the clock, radio, and no lights turn on, on the dash. Could that be due to the timing belt as well?

And on a side note, could the main relay be a cause as well? I know you didn't mention it, just figured I ask because I keep hearing about it.