racebread240sx

I tried searching and found a thread on NICO to replace a cap on the digital speedo. They said this was a common problem, so I tried the test they suggest to see if this is the problem. I also got another cluster set from the junk yard. No results so I am thinking the problem is somewhere else. My power door locks are also not working so maybe these are related? I purchased this car a month ago and would really like to get this resolved before my rb25 is running. I have cheched all the fuses. I checked the speed sensor in the tranny to make sure it was plugged in. Maybe during my swap the problem will go along with the KA. Any help would be great.