so lost

[89 coupe]

ok so my hud and cluster lights wont light up anymore and my odometer and trip dont roll. heres a little bit of history. i had my radio pulled out and all the wires were just hanging there not capped. my hud wouldnt work then but when i wired my radio up it worked. it doesnt seem to have too much of a problem coming on it would just take a couple of seconds some times. all my warning lights come on and all my guages still work. so i dont think it is my cluster.

also when i have my interior lights fuse pulled out and i turn my key off i can see my hud flash. so its obviously working its just not getting any power.

now ive been looking at a wiring diagram and i cant seem to find if there is a main power to the cluster. (im kinda a noob to wiring diagrams.) does the cluster just get power from the illumination switch? i am going to be pulling out my cluster and checking all the wiring. and which illumination switch is it? the one on the steering column or the brightness on the dash?

thanks

[p3tchSR]

http://www.nicoclub.com/articles.php?id=158162 maybe?

[moso]

agreed

[89 coupe]

i opened it up and all seemed fine. ill try that grounding wire thing and if that works then i know its my tcu. but any other suggestions? thanks for the input so far