Gear selector indicator Digital

Hi All... Thanks in advance, i have one that has me stumped so some help if possible, been through as much basics as possible.
96 SC constant 4X4 1kz with digital dash.
Im pretty sure the issues are all related! ?

The gear selector in the digital cluster does not light up!
The OD light will not light up when the button is depressed !... will not click out of overdrive!
and the ECT power switch will not light up or change shift patterns.

Auto changes smoothly, changes at proper shift points , shifts into overdrive and lock up converter works as it should at around 90kmh

Sounds a bit like a power feed that is common to all those circuits is missing. Check for any fuses blown in the fuse box and any in-line ones that may be hidden somewhere. Others here may be able to make more definite suggestions.