5k dash light relay?

[RODNEY MICHAELSON <HOTROD@chumash.snfc21.pbi.net>]

electrical hints needed.
Went to snow this weekend. Great day skiing. Got back in my 86 5kcst and 
noticed climate control display not on. All systems functioned. Later 
turned on driving lights and no dash lights. Wasn't too dark so cruised 
on home. Got home and played with headlight switch, turning on and off a 
few times. Dash lights and climate control display came on fine. Tried it 
10 times in a row and worked fine. Waited a few minutes and tried again. 
No dash lights. I can play with headlight control and dash lights will 
come on. Is there a relay to look for. Sure sounds like it. Looked at 
fuse panel where there are 5 relays but could not tell which one. Can not 
hear a definate click. Any help is appreciated.
Rod Michaelson
Walnut Creek, CA