what year is it i do not think it matters but at the front there is a plastic piece with the air vents at the bottom are 2 Philips head screws one on each side then it will pull of and there is screws on the radio that hold them in remove these then side the radio forward and disconnect the plugs and unscrew radio ground and unplug antenna i hope this helps i did this on my 1989 Ford Festiva
To replace the radio in a Ford Festiva, start by disconnecting the car battery to ensure safety. Remove the trim panel around the radio using a flathead screwdriver or trim tool, then unscrew and slide out the old radio. Disconnect the wiring harness and antenna cable from the back of the radio. Finally, connect the new radio's wiring harness and antenna, secure it in place, and reattach the trim panel before reconnecting the battery.
Ford Festiva was created in 1986.
speaker wires
http://www.clubprotege.com/wil/howto/tachometer/index.htm
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remove the rim, remove the two bolts that hold the caliper on, remove the two disc retainer screws and the disc will pull off the hub assembly.