OK I'll check it out and report my findings in a bit.If fuse 30 is fine and you correctly jumped the red wire to the black wire in the unplugged dimmer connector, then the dimmer switch is unlikely to be the problem. Start by checking whether fuse 30 has battery voltage at both top tabs with the light switch on.
Do the heater control panel lights work and both brighten and dim with the dimmer switch?
When everything was working yeah the dimmer brightened and dimmed the backlights behind the heater a/c controls. Now its totally dark.