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Ok folks, I'm trying to fix my speedometer/odometer in my 1995 Nissan pathfinder. I know this is a somewhat common problem, and have looked through some other helpful posts. Still struggling to find exact details for my specific year. So, I bought a Chilton repair manual thinking it would have all the electrical diagrams to be able to diagnose this, but alas it wasn't that helpful. I couldn't find any detailed wiring diagrams specifically for the dash. Any tips from the experts on where I can find a schematic showing what is supposed to be at each wire in the harness? Or just any tips in general on diagnosing this? For completeness, here's the symptoms: A few months back the speedometer started getting twitchy. It would twitch down as you are driving at a constant speed--it never twitched above your true speed (checked with GPS watch). Then, this worsened and eventually got to the point where it would stop working altogether and stay at 0. Often times when the speedometer is stuck at zero the check engine light is also on. The times when it was stuck at zero (as opposed to being twitchy) eventually became more and more common, until now it is always stuck at zero with the check engine light on. The odometer also does not work when the speedometer is stuck at zero. Transmission seems to be functioning normally. Really appreciate any and all help!