Clock repair on a 1995 348

I would suspect that the clock will work correctly once it is set correctly using the procedure in the owners handbook. I no longer have the book at my disposal, but I THINK your clock is probably in the "stopwatch" mode, instead of the "time of day" mode. You just have to push the buttons in the proper sequence. I would certainly check that before sending the clock out for repairs.

 

The tiny buttons that set the clock tend to get lost inside the housing (when pushed too hard). Take it apart and investigate. Be careful, patient.

 

Yep, I agree with the above. There is a rubbery membrane that mounts behind the plastic panel that you see, and when you are struggling to to set the clock through those 2 tiny holes, you are pushing on the membrane that then (theoretically) pushes on the actual clock set buttons that are fairly deep (4 mm maybe?) inside attached to the circuit board. On my car it was very hit-or-miss. If all else fails and you remove the unit and open it up, you can get rid of the membrane thing. Once it's all back together you just use a piece of wire like a straightened paper clip poked through the holes to set the clock. It takes a few tries to find the buttons down in there, but once you get the hang of it it's fool proof.
Personally between the fact that that whole module is notorious for failing, and the plug to the wiring harness on the back of it is pretty finicky, if the A/C and heater are working properly, I would be grateful for for what you've got and leave it alone. Plus as far as I can tell the clock will only run on 24 hour military time, so if I'm feelng lazy I just use my watch anyway.