Charged my battery backwards
I was jumping my car off and I accidentally switched the
positive with the negative. I never turned on the car
because the horn started blowing and I knew something
was wrong. I changed the 100A fuse cause it was blown
and so I jumped my car off again and it started but it cut
off after 15 minutes. So I had my battery checked and
Walmart said the battery was good, then I had my
alternator checked and it was bad. I replaced the
alternator and then jumped my car off and it crunk right
up. After about 20 minutes the car shut down once again.
Is there anything that i need to do or missing? Please
help?