Where is the fuse box located? we do not have an owners guide for our 1986 Mustang GT.

Straight up from the hood release is the "low power" fuse box. A latch cover hides/protect the fuses.
There's also a "high power" fuse box behind the battery, also with a latch cover to protect it. These fuses are of a much higher rating/amperage than the "low power" fuses.
You might need to get an owners manual as it spells out what each fuse does in detail.

Check in the passenger fuse box, the fuse panel is located below and to the left of the steering wheel by the brake pedal. Remove the panel cover to access the fuses...




And in the Power Distribution box, located in the engine compartment, position 17, 20AMP (mini fuse).

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First thing to do is check the fuses. I believe the fuse for "Power Point 1" (the one in the instrument panel) is in slot 61 and Power Point 2 (the one in the center console) is in slot 64 of the fuse box which under the hood. The fuse box is located just in front and above the passenger front tire and the cover pops off easily. Check your owners guide (pages 190-194) to find the location of the fuses.The fuses in slots 61 and 64 are 20amp and should be yellow. Pull the fuses with a fuse puller and check to see that the two melal legs are connected inside the clear plastic with a ~ looking bar, if the ~ is broken then the fuse is bad. Replace the fuse with a new one (very inexpensive) and test the power point. If that dosent solve your problem then there may be something wrong with your cars electronics, consult a professional.

The instrument panel fuse panel is located under dash (driver side) early brake.

The high current fuse panel is located in the engine compartment on the left-hand fender apron.

This is for one 1996 Mustang but can help like reference guide: 1996 Ford Mustang - Owners Manual (for FUSES, page 272 and next)

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it will be in the fuse box under hood or under dash it should be labeled as PWR WIN

Look in the owners manual or the underside of the fuse panel cover.

http://www.genuineservice.com/genuineservice/en/default?page=genuineService

Go to this website and pick owner guide in left task bar.Then input vehicle info and pick get owner guide. Then pick owner guide 3rd printing and your fuse info will begin on page 192.

http://www.genuineservice.com/genuineservice/en/default?page=genuineService

Go to this website and pick owner guide on left task bar. Input your info and then pick owner guides.Your fuse information will begin on page 118.

it is normally in the lid of the fuse box and in your owners manual but a dealership can also print you out one also you can get a 12 volt tester and locate the blown fuse that way

the fuse box is located at the bottom of steering column cover