undid negative cable on 98 dakota,now flashers flash about 8 times but truck wont turn over,HELP.

 

Your cable may be loose. Does your ignition click once and not turn over? I've had this happen over corrosion and mycable is getting old. I haven't bothered to replace the clamp but you may want to take the cable off of the terminal get a set of vice grips and squeeze it together some than put it back on. This has worked fine for me when my connection was bad. Also if you have corrosion on it get yourself a wire brush, baking soda, and water and go to town on it. A good quick fix if you're ever out and about and it does this is to pull the cable and pour a coke or pepsi on it that will wash away a lot of corrosion as well. Good luck with that and let me know how it goes.