I did a similiar thing putting my friend's Eclipses battery in my Honda (he lost the alternator belt and we used my car to charge his battery to get it home) but the terminals were switched on his battery compared to mine and it was dark. I blew the 80 amp large fuse under the hood. My car was completely dead though without that fuse, no lights, no crank, nothing. I replaced it and everything was fine. Check all of those under the hood and you'll probably find the problem.