PC component identification - major newbie...

Hey,
So, I'm trying to ID the components on the board of my cars cruise
control board (it's broken). Now some I know, like a component with
"R43" next to it is a resistor, or "C12" is a capacitor, "Q16" is a
transistor, and "D1" is a diode. But here are a few I don't know and
would like help IDing:
"RA3" -
"X1" -
"IC7" - (integrated circuit?) -

That's it. School me!

Thanks,
Paul B.

.

Relevant Pages