I have a 94 V6 TBI 4wd s-10. Recently I was driving on the highway and my #4 fuse blew. Turns out this fuse controls a lot. My transmission lost overdrive which was the first thing I noticed. Then when I got off the highway, I also noticed that my truck was way slow when accelerating, almost like I was towing something. But then it didn't shift...at all. I guess it locked in 3rd for safety. Also, I had my headlights on at the time so my car started beeping like I forgot the headlights after I shut the truck off. Also, the alternator stopped charging. I know because I have a capacitor right behind me with a voltmeter. Now, I've spent hours following wires. I don't want to totally strip the harness but I checked everything that wasn't wrapped in tape. I did try to drive with the gauges out...which works...but then I have no speedo, no gas gauge, and no trip meter. This is going to make guessing my remaining fuel a bit of a challenge. So, what I really need to know is "what does this fuse power?" I am going to check them one by one until I figure it out. A wiring diagram would help immensely. Hopefully not a generic wiring diagram. Thanks guys!