Putting doors together today and as usual eating up a lot of time. Never assume the locks work before installing them! I had put the key in several times and all seemed fine until I installed them and found the cylinder didn’t turn on either one. Out they came and a trip to the locksmith, luckily the key just needed trimmed a bit so it would go into the lock a few thousands more. After the trim, and all of $10 they worked fine and I reinstalled them for the second time. Obviously the previous owner could not lock his car