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Today, I noticed that I was missing a 10 amp fuse (Fuse 18, per my research) labeled "Back" on my '91 VR4. Since this appears to control a few things (Backup lights, Light Automatic Shutoff, SRS Diagnostic Unit), and since my reverse lights were not working, I decided to insert a new 10 amp fuse into the missing fuse socket. Upon doing this and turning my key to "ACC", I noticed an electrical smell. But before I could react, a loud pop came from the engine/hood area, and black smoke started to rise out of the passenger side of the hood (and into the cabin via the air vents). I turned off the car, and removed the 10 amp fuse. I've checked all the remaining fuses on the car, and all are good.
Without fuse 18, my car still starts, and everything generally seems to work (although I have not extensively run through all the electronics yet), I was just curious if anyone might know what happened. Something surely got fried, right?

Without fuse 18, my car still starts, and everything generally seems to work (although I have not extensively run through all the electronics yet), I was just curious if anyone might know what happened. Something surely got fried, right?