You've got 2 fuse boxes in your Mustang the fuse junction panel and the power distribution box. The fuse junction panel is located under the left-hand side of the instrument panel. Kneel outside of your driver side door, stick your head under the dash/steering wheel, look up and you'll see it (it has a black cover that you need to take off and there will be a fuse diagram printed on the inner side of the cover).
The power distribution box is located in the engine compartment on the left-hand, front fender apron. There will be another fuse box cover with the fuse labels printed on the inside.
I attached some pictures to help you out. The first two show the fuse junction panel (inside the car) and the last 2 show the power distribution box (under the hood)
__________________ 1984 Mustang 331 stroker
1990 Mustang 5.0L convertible |