whats my problem
 

So i switch my alternator i bought a new today and like any other problem hassle to put in in this cold ass weather anyway i install my alternator with my old battery i had to push start the car the car started up but i turn my HID's on and the car shuts off i push start it again and instead i turn my yellow foggies on i look at my volt meter and the car running the meter's pointer is in the red zone after i ran the car for like 20 minutes with my foggies on then i turn my HID's on again and the car acts like if there was a short some where and the check engine turns on for like 5 seconds and turns off again but the car running then when i turn all the lights off the meter goes up to like 13.5 voltage when everything is off what can that be???

Re: whats my problem
 

There was nothing wrong with your old alternator. You have bad engine-chassis grounds.

Take a set of jumper cables and ground block to chassis, see if that doesn't fix you right up.

Re: whats my problem
 

do i need a new battery for my new alternator??? so i should just check my grounds???

Re: whats my problem
 

Your battery may or may not be any good anymore, but you won't know until you charge it for a while with a functional ground system.

Seriously, toss the jumper cables on as just ground straps and go for a drive. You'll know if that's your problem within thirty seconds, and you'll know if the battery holds a charge within fifteen minutes.