wiring problem?

OK, so here's a weird one. About 4 or 5 times a week when I turn the truck on there is no turn signals or AC/ heater blower, you have to shut off the ignition and try it again. I have replaced both fuses and put in a new flasher. Any ideas? :banghead:

Ignition Switch? Just went through this with my '89. Nothing was working, not even motor. Traced it back to Ignition switch and it had a shorted out contact. Pretty easy to replace, but check it first.