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Your tach still works because it reads engine rpm. The computer uses info from the speedometer but the signals for the tach and speedometer come from different places. I can't remember if your speedometer is cable driven or electric but the sender is on the drivers side rear of the transfer case output tailshaft housing. If cable driven check that the cable isn't broken inside (I usually put an electric drill on the cable and run the drill to see if the speedometer works (some run backwards) If the drill is able to make the speedometer work check the gear that is inside the transmission by removing the part the cable is attached to. That drives the cable. If electric, check wiring and if OK, replace the sending unit.
Believe it or not but I think your hazzards are on a seperate fuse. If you had lost just your turn signals I would say probably a bad flasher but the speedometer is actually a little electric motor now, not a cable driven thing like years ago so it's probably just a fuse. Now, why did the fuse blow? Trailer wiring shorted? Corrosion near the tail lights? You been mudding it lately? Or maybe just a corroded tail light socket. Check all your lights afterwards. Hope this helps
i have a 1988 jeep wrangler 6cyl with 5 speed transmission. I was shifting the jeep and it got stuck in third gear. We opened it up and saw that the linkage is aligned and everything is in place. I dont know what is wrong and what to do next. please help ....