Last week my "89" 5.0 manual trans. mustang wouldn’t start,I called the tow truck and that was that. I was told thejunction box on the side of the firewall where the batterycables hook up was bad. So I replaced it and the battery. The car started! Moments latter,the wife and I were on our way to wholly world to pick up a few things... On the way their I decided to cut the car off while on the HWY and restart it just to see if the alternator was working.... Nope I had to crank the car while on the HWY at 80 mph. We pull into the Wal-Mart parking lot, I turn the car off, and the car’s belts kept running. I had to disconnect the batt. To cut the cars belts off... While reconnecting the batt. cables the post sparked as if the batt was backwards. Driving the car home was a nightmare, once again, Icalled the tow truck because the car quit on us!The starter went bad, so I have replaced it and still I’m having problems... Any Ideas?

 

if the car kept running when you turn the ignition off the first thing that comes to mind is the ignition switch... any recent mods to the car???

 

WOW that just sounds like a cluster f*ck of a mess.... is the wiring correct on the starter solenoid?