No dash lights 100's Cruiser 2006 105 model

did you check fuses in all 3 fuse boxes? theres one onder the bonnet, 1 on drivers side kick panel (you have to take kick panel off to find it,) and there is one on the passenger side as well (you have to take that kick panel off as well)

Chris what in laymans terms is a rheostat

All fuse boxes checked out fine.

The instrument light dimmer switch?

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Alan. I have to confess I am a Prado owner, not a 'real' LC owner! but, on my vehicle, there's a roller type 'switch' on the dash below the gauges, that controls the brightness of the instruments. Mine is just below the ignition switch, and its not impossible (I've done it) to accidentally roll the control to the off position. Others may call it a potentiometer, but I called it a rheostat: call it what you like, it's basically a 'volume control'.
Does this help? I can send you a photo of mine if it will help.

Chris, you were right to call it a rheostat or a variable resistor. A potentiometer is similar but performs a different function.

Just fixed the same type of problem. Checked out ok however
the fuse was not blow but had cracked the element on one side.
My local auto elec has found this before with cheap fuses.
So would think that you might pay to change your tail /dash light fuse.

Regards Bushy.

So...was it the dimmer switch at fault...or the operator of the dimmer switch.?