After reading the Techinfo section pertaining to the compass & DIC problems, I'm wishing I had the next generation Bonneville. It seems lake a common and easily corrected problem. But nooooooo, I have to have a different issue. Here'* the scoop:
Neither the compass nor the DIC display works. The DIC seems to function correctly as it beeps aprox 10 seconds after the ignition is turned on or if a door is opened. Just no display. I fiddled around with it this morning and was able to get the displays to come on intermittently but not stay on. I took the instrument cluster inside to get a more thorough look and here are my findings:
It looks to me that this trace is interrupted. I temporarily connected it but nothing happened. Then I grabbed the multimeter to test continuity and nothing seemed out of the ordinary. The only thing else I could think of was a discovery on the compass PCB itself. There are two transistors that are connected with screws to the back plate (a heat sink is all that I can think it'* for). These screws have nylon locking nuts on them. The strange thing is that there is no way the nuts could have been tightened down without "backing up " the screws. The screw heads are well inside
the plate. This leads me to believe that the transistors were mounted to the rear plate and then soldered to the board:
The solder joints do not look like they came from a machine. This is tomorrows project. I'll de-solder the transistors to remove the rear plate and inspect further. If any one else has dug this deep for a solution I'd like to know of your experience.