Hello thank you for respondingWelcome to the Forum.
Did you remove the DDM (Driver door module) from your old door and install it in the new/replaced door. What year was the new door from? Each DDM has a factory code printed on the DDM so you need the code for the particular DDM you have installed to operate the keypad. The factory DDM code is printed on the DDM in the forward part of the door. It has lots of wires attached.
The currently installed DDM may not be working correctly or missing a connector, so perhaps replace with the DDM from your old door.
I changed the door and put the old Ddm in it worked fine but I had to send it to a body shop to straighten the hinges when it came back the lock/unlock and mirror switch did not work nor the keypad I had the key pad from the new 1995 donor door so I tried it. it lights up when you unlock the door with the key fob but if you push any buttons nothing happens so I put the ddm that came with the new door same thing
If you say that's symptoms of a bad ddm I will pull another one and try it
Eagerly awaiting your response