Ford Repair: 94 Aerostar, inertia switch, haynes manual

Question
Is the Inertia Switch the same as the switch referred to in the owner's manual as the one that shuts the fuel down incase of a collision, or are they different? Where to find them? Please use simpler language than the Haynes Manual(not difficult!). Also, where is the horn relay or what color wires go to it, and would you know what the set of four relays under the clutch-oil resevoir govern? Lastly what's the best shop manual available for this model? Deeply grateful, Erik.

Answer
Hello and thanks for the question...I'll try to help.
Yes, the inertia switch IS the fuel shut off switch. As far as location.....look in the owner's manual. As far as the relays ........you didn't provide enough information about the vehicle. For the manual...the BEST is ALWAYS the factory manuals
Hope this helps,
Erik