Unfortunately, it would be simple if it were just one particular bulb that is dim. All of the interior lights situated on the dashboard are dim, even the clock. Only thing that isn't would be the overhead light and the gauges I have. 2 on the pillar and 3 in the center (radio relocate) all Defi.

Only thing aftermarket other than the gauges is the instrument cluster overlay. (Trustz or a knock off?).

Before you ask, yes, I've adjusted the factor dimmer as well as the ODO and defi dimmer.

Any ideas?

 

does the dimmer actually adjust? I know you said you adjusted it, but does it work?
I had mine go bad before, when it went bad it was stuck at what ever level it was at prior to breaking.

 

I've got gauge overlays on my car as well.

The factory dimmer doesn't seem to work in my car either. When I drive at night, the needles don't illuminate very well.

 

Dimmer works fine but max setting isn't bright at all.

 

bypass the dimmer switch and see if that changes anything. that'll squash the dimmer switch idea.