Today's lesson is this: Do not trust that the customer knows the year of their vehicle.
I arrived at the vehicle, purportedly a 1993 Jeep Grand Cherokee, at 1:00 PM. Using a Y154 accureader, I got severely conflicting readings between the driver and passenger door, and the rear hatch lock was damaged. At this point you can guess the quality condition of this "fine" vehicle.
Did I mention the six inches of snow? There was six inches of snow as well.
Ultimately I decided to disassemble the drivers side cylinder. On the upside, the interior door panel was not terribly well attached - in fact it's better attached now. It became clear, after the dis-assembly, that the 1993 Y155 was not the blank of choice, as the cuts did not line up perfectly, switch to the Y154, and perfect. I used fill online to create the ignition key, and still, no love. At this point, I checked the sticker on the driver door, and compared the VIN to that of the body (through the windshield) it wasn't the same. In fact, the door sticker showed a May, 1992 manufacture date.
In desperation, I decided to disassemble the passenger cylinder, which did not share a single cut with the driver's side. The passenger door panel was not attached in any way, it was just hanging there. I wish I had started with that side. Used fill online again, and had a working ignition key - after FAR too long.
Not my day.