I recently bought a 90 cherokee laredo. Its a real beater but it's still got a good bit of life in it (and hey it was $550 bucks). Anyway about 2 days ago the speedometer just stopped working (stays at 0) and the odometer and tripometer aren't moving either. The fuel gauge was stuck all the way up but that seems to be working now. The oil pressure gauge hasn't ever worked right (which I don't really care about anyway) I checked my fuses and none of them looked cooked (switched a couple around just to be sure) so I don't think it's a fuse. Maybe it's a short in the wiring somewhere? Any idea's on what I should do here?

Man, oil pressure is the one thing I worry about the most!!! I installed a mechanical AutoMeter guage for a piece of mind.

oil pressure sending unit, they go bad all the time. it is on the passenger side of the engine toward the firewall. and im willing to bet the govener teeth are worn causing your speedo and such not to work. just find where the cable goes to under your jeep and check it out.