I need to know where a few fuses are: the horn fuse, the cigarette lighter fuse, and the radio fuse.

f you look on the inside of the fuse cover, it is probably labelled Auxiliary.

All of those are controlled by or influenced the BCM. You need a good auto electrician with a pro grade scan tool to check the BCM and communication to and from it.

probably the fuse that powers the cigarette lighter also powers the radio so check the cigarette lighter and socket for a short and replace the fuse.

Generally the lighter fuse is located in the fuse panel on the drivers side dash and is not only the lighter fuse but the horn/radio as well?

first if you smoke and was using the cig. lighter look at the element in the lighter and inside the cig. housing may need replace.will cause fuse short open. next get a volt meter and test fuses for 12 volts.the horn may be on a seperate fuse and you may have bad horns or a relay.again you need to unplug the horns and check for voltage on the horn wire when the horn button is pushed.no voltage then remove steering wheel cover and test for voltage threw the horn switch.

I had the same exact issue today on my 86 Fiero. The Radio and Horn stopped working same time. There is a 20 amp fuse that is marked for the Horn but no mention of the radio. It is in the middle of the Fuse box. 86 -88 should have the same fuse box. ( If you reference the Chilton book they say the fuse is for Horn Cigarette lighter etc. but again no mention of the radio) I just happened to check this fuse (It was blown) and sure enough everything came back. Hope this helps......

Fiero R12

number 32 is the front cigarette lighter fuse 2 and 27 for the audio unit which i presume means radio
these are in the fuse panel under the dash on the drivers side

it should be on the same fuse as your radio,but i would just start pullin fuses and replace the blown ones