90 LX 5.0 Odd Electrical Problem

Okay, I had to replace my heater core and in the process had to remove the dash. So it's been pretty cold here the last couple of nights and on Tuesday morning the heater blower and the turn signlas wouldn't work. At lunch that same day, I got in and voila both were working; and again on the way home they worked fine (they had been working fine for the last week or so up to this point). So this morning I get in and turn the igniton to 'on', but did not engage the starter; both the blower and turn signals worked, until I started the car, then they both quit!

Any ideas? I also replaced the stock radio and removed the stock amp while I had the dask apart over Thanksgiving.

Thanks.

Turned out to be the ignition cylinder; I replaced it and voila, problem solved.