Do a quick search for cruise control switch to see some recent discussions. I just did this job last weekend. You have to remove the airbag (quick and easy -- star drive bolts on the back and disconnect the battery), the steering wheel (10mm alan wrench and a good breaker bar), and the under dash cover must be removed to thread the cable and plug it into the control unit of the CC. Good luck.
'87 300TD 304kmi (RIP)
'95 Toyota Camry Wagon 125kmi