Hello all, I'm new to this forum and this is my first thread. I mostly spend my time on Duramax forums but I'm in need of some help for my dad's cadillac. He has a 1989 Deville and the digital dash is not working. I did a search on here for similar problems and came up with a couple but they didn't get very in depth before the problem was solved.

I've read the sticky about getting help on here and this is what I have so far. We have tried multiple times to unhook the battery and get the car to reboot and this has not worked. The car has recently gotten a new ecm. The car runs and drive's just fine but no digital dash. We have also checked the fuses and all seem to be fine. The wiring seems to be in good shape with all grounds hooked up.

Hopefully I've provided enough information to start the trouble shooting process but If I need to provide additional information I would be happy to do so. Any help on this would be greatly appreciated. Thank you

 

Are there any more details I could provide to get some suggestions on this?