Veronica:
Mmm ... not purely mechanical. The system is activated by a switch in the door jam that drives a solendoid. Once the solenoid is activated the mechanical stuff you mentioned takes over, mostly driven by a vacumn canister. According to the shop manual the fuse appears to be an "in line" fuse. That is, it's embedded in a harness assembly, not located at the fuse box. (I'm guessing it's located there because the tilt was an option.)Unfortunately I can't locate the in-line fuse by feeling behind the instument panel ... but I suspect it's back there somewhere.
Thanks for your input...
Ken