Ae86 dimmer switch?

[Gts_coupe87]

I tried looking this thing up but have no idea what it looks like. Does the usdm come with a dimmer switch? If so please let me know where I can find it on my car. I took it all apart and don't see anything. I have an s2000 cluster and every time I turn my lights on the cluster doesn't light. So at night I can't see my temp/gas/ rpm any help will be greatly appreciated.

Thanks!

[dr.occa]

@Gts_coupe87 - Yes, all AE86 chassis have a dimmer switch. It's integrated into the headlight switch. The controller is the outer ribbed ring of the switch.