I see there are a lot of great repairs and suggestions in the archives for cable operated speedometers, but I couldn't find too much for electric. I figure there must be a way to troubleshoot the wiring going into the speedo to find out where the problem is before I open it up at least. I guess I need to find a wiring diagram somewhere or wait, I know somebody on here must know.

I finally fixed my dash lights and door lock cylinder today so I've been on a role. The speedo is pretty much the last thing that needs to be repaired since I bought the car two years ago.

--That reminds me, I've got to update my sig's mileage by 20k miles, guess it's been a while.