I have a 1991 940 turbo. Last night i was driving home my lights became real dull and when i got home it just shut off. So i figured battery was shot so i replaced battery. but now when i go around sharp turns or it sometimes just randomly happens my lights and abs light comes on and my power steering goes out. i have no idea maybe the tensoir belt needs tighten. how do you tighten belts on these cars any ideas please help

 

if it is just the belt slipping,
it would be toast by now,
and need replacing.
is it charging at 13.8 v ?
could need a new alternator.