help dasboard light problem

need help ideas on how to troubleshoot dashboard lights problem

my '93 civic instrument lighting in dash board go on and off intermittently
but are off more than on and i can not find the trouble is this a common
familiar problem to anyone.

occasionally riding along and they come on then 2-30mins - 2 hours later
(random) they will be off, when they are on i can adjust brightness with
dash light dimmer switch. i tried wiggling wires, banging dimmer switch,
and looking at fuses in fuse box swapping for new one etc and nothing seems
to produce the desired Cause/Effect need to diagnose and fix.

any ideas ?

rob

 

I changed the stereo to a pioneer deh4500 and i used a OEM style honda
connector kit to create a plug for stereo wires to match the honda stereo
connector

i can't say if the trouble started at or near the time of stereo change but
it is possible

is there something i should be looking for to fix ?

robm