jbach, what did you find about the rheostat - and what's its purpose - where is it?
I'm looking for the cause of my recent "lights out" (no Jr. Seou intended). My 87 300TD has gone dark. I jump started it because the battery died when sat waiting for me to RnR the vac pump. The cluster lights used to be dim, now it's black dark. - cluster and radio and climate control panel - Everything works, but no lights. The warning strip of lights below the cluster works. And the warning light for exterior bulb outage lit-up briefly, but all exterior lights are working, and that bulb-out warning light is now off. Everything works - but it's black dark. Is there a dimmer that may be turned to zero? Any advice?
Thanks