A few months after I bought my car (used 2000 zx3), the odometer / tripmeter
illumination (with no headlights, audio or other acc. on) flicker at stop,
or while driving. This happens worse with lights on.

Recently, one headlight went out, and 1 month later the other one went.
Could this be related to the problem.

Last night I talked to a Ford mechanic (and a friend) and said that it is
probably a bad ground somewhere. But the fun part is that there are over 200
grounds in the car. EEEK!

He suggested the taillight and headlight grounds, and the ecu ground. I
checked these and they are ok.

Are there any issues where there may be a specific problem ground that is
reported often of "losening or degrading"?

This car also has a keyless entry system that is not functioning (when I
bought it). I told him I checked all the fuses visable in the fuse panel. He
laughed and said the panel has fuses on the back side too (or behind the
main panel, I have to look into this when the sun comes up). He said, "that
it is a blown fuse. And that the power door lock actuator jammed and tripped
the circuit." I checked all the fuses I could find and no blown fuse.

The Dome light does not light up either.

A few weeks ago my backlight to my lcd odometer was not lighting up. A few
days ago it started working.

I have a bad rear motor mount on the engine, the engine vibration has been
getting worse in the months I have not been able to repair. $$ (Tuesday that
issue will be taken care of at ford dealer). But the odd thing is that the
flickering started after the vibrations started, and got more frequent and
worse as the mount was degrading. ???? hmm.

Any help on the subjects is greatly appreciated.