The key element here is that there is no power on either
side of the inertia switch. It should have 12 volts on at
least one side. That means the EEC power relay is not
suppling power to the computer or fuel pump circuits.
There is either a blown fuse link in the EEC power circuit or
the EEC relay has failed.
See the following website for some help from Tmoss
(diagram designer) & Stang&2Birds (website host) for
help on 88-95 wiring http://www.veryuseful.com/mustang/tech/engine
http://www.veryuseful.com/mustang/tech/engine/images/IgnitionSwitchWiring.gif
http://www.veryuseful.com/mustang/tech/engine/images/88-91eecPinout.gif
http://www.veryuseful.com/mustang/tech/engine/images/fuel-alt-links-ign-ac.gif
Diagram courtesy of Tmoss & Stang&2birds
side of the inertia switch. It should have 12 volts on at
least one side. That means the EEC power relay is not
suppling power to the computer or fuel pump circuits.
There is either a blown fuse link in the EEC power circuit or
the EEC relay has failed.
See the following website for some help from Tmoss
(diagram designer) & Stang&2Birds (website host) for
help on 88-95 wiring http://www.veryuseful.com/mustang/tech/engine
http://www.veryuseful.com/mustang/tech/engine/images/IgnitionSwitchWiring.gif
http://www.veryuseful.com/mustang/tech/engine/images/88-91eecPinout.gif
http://www.veryuseful.com/mustang/tech/engine/images/fuel-alt-links-ign-ac.gif
Diagram courtesy of Tmoss & Stang&2birds