Looking for some advice, as I am useless with car electrics
I bought a 1991 8v GTI a few months back as a winter runaround - recently got my licence back after an enforced spell of 18 months off the road due to medical grounds. Long story, but being diagnosed with Parkinson's kinda makes doctors nervous about driving

Only intended to keep it perhaps until the wife's new car arrived, but I rather think the Mk2 is growing on me, so intend to keep it for a lot longer

Car is in great condition, with full service history, every MOT cert and plenty of receipts, but there have been a few electrical problems, that I am working my way through
Dial illumination - one bulb was out - I have fixed that
Interior light - contacts were worn - I have fixed that
Horn stopped working after I got the car - replaced relay, and back to normal
Dodgy contact on left side headlight - connector just needs fixing, as dipped beam cuts out intermittently, temporary fix is to reseat connector whenever it comes loose.
However, two are stumping me and my very limited knowledge

Cigarette lighter - doesn't work, and no illumination
Heater control panel - blowers work at all speeds, but no illumination
Fuses appear to be intact, interior lights come on, dash illumination is fine and I'm kinda stumped on what to try. With my illness, it's not always easy to do tricky electrical stuff as my hand can shake terribly from time to time.
Any suggestions to try?