when i shut off my 02 grand cherokee the starter continues to run. it's not grinding or anything, it just won't shut off. any suggestions?

 

Most likely your starter solenoid or ignition switch

 

You might smack it with a hammer for a caveman style diagnostic haha. If you have a remote starter then see what it does. You can use a jumper wire from the little wire to the bigger one at the starter. If the remote starter or jumper wire makes the starter work normally, I would look into the ignition switch for a problem. If the starter still fails then its probably the relay/starter.

 

You may want to check the starter relay in the under hood power distribution center.