I bought a car that was in an accident and the drivers seatbelt locked. I bought a new seatbelt and installed it but i still cant get the belt to pull out?

SOURCE: seatbelt on 2007 ford fusion

It is a safety latch that is doing it's job.

If you wreck the car the belt stops preventing you from hitting the dash or going through the windshield.

Try this test to make sure they work:
Get in the car and start it,

Put your foot on the brake, and put the seatbelt on -

Now yank on the shoulder part real hard if it doesn't stop immediatly you should get it replaced.

SOURCE: drivers seat belt

Good day
What you have there is called a PYROTECHNICAL SEAT BELT TENSIONER, What it does is works with the air bag system. When the sensors reads a great drop in speed as in an crash this device goes off and puts tension onto the seat beat to bring the person in the seat as tight as possible into the seat.
Hope this helps.
Now if you are having problem with one of the seat belts there could be a problem with this device, I would take it to a quality person that works on the air bag system. If not the air bag system could be tripped and then you are into a lot of $$$$ to get it fix.
When you are trying to fine some one to fix or look at this ask him or her about the Pyrotechnical seat belt tensioner system if they can explain it to you then that's good if not keep looking.

Hope this helps you out please let me know how you make out

Cheers

SOURCE: 1999 honda crv seatbelt

the honda dealer can fix but charges alot. i say take off pannel (it pops off) and see if there is junk in there or if you pull it to far this will happen all the time

SOURCE: drivers side seatbelt retracter will not work volvo 1996

YOU HAVE TO UNTANGLE IT IT MAYBE TRICKY BUT JUST IN MY OPINION GET AUSED ONE FOR 10-20 AND DONT FORGET TO UNPLUG NEG BATTERY CABLE FIRST UNLESS YOU WANT THE SRS LIGHT TO COME ON

SOURCE: My seatbelts feed out properly and retract

There is a ball inside that when you brake moves and locks the seat belt. Your best bet is to drive and see if it locks when you brake hard. If not replace it. Some cars wont lock when you pull on them only when inertia takes over do they lock.

Testimonial: "very good info - helped"