How Seat Belt Repair Works

Testing the Seat Belt

It is very important to diagnose the problem first.
Of course if your seat belt is locked, making rattling noise when retracting or is very slow at retracting or even has no tension, you can be sure it needs repair. But if it appears to be working fine and your vehicle has been in an accident, it is very likely that the seat belt may be bad and needs repair. Each seat belt is equipped with at least one sensor with 2 prongs or "pins" that connects to the plug. This sensor activates the gas charge in the seat belt that deploys it. A good sensor has a resistance between 2-3 Ohms. A bad sensor will either have no resistance or anything other than between 2-3. To test your seat belt, you will need a multi-meter, pair of small pliers and a knife blade.

1. Disconnect the battery in your car. 
2. Remove the seat belt retractor out of the vehicle. 
3. Locate the sensor on the seat belt that looks like this:
   
   
   
   
4. Use the blade to carefully undo the orange clip
5. Remove the plug - should look like this:
   
   
   
6. Using the blade & the pliers remove the plastic housing to get the pins naked as so:
   
   
   
7. Set your multi meter to "Ohms" setting and connect to the pins.