Just a question:

Was this car sitting for a while or under very limited use before you bought it? If so, I had a similar problem with a 'sitting' '86 SEC about 3 years ago. Upon my early driving/usage, several fuses - which were old and brittle - began failing.

So - try to check the fuses first. It MIGHT be this simple.
In you fuse box (which is at the top-rear of the engine compartment, just in front of the driver--big black box) is a removable card with description of fuses, functions, placement, etc. Check that first. If not the problem, then you will have to have a tech look at it.

Good luck.