so, nothing in my instrument cluster works, and I was wondering if that could be because there is one fuse for the whole cluster and it is out, or if it is just a coincidence that everything is broken. It would be kinda nice if I could tell how much gas I have and how fast I am going. But hey, whata you expect for $450.
Instrument cluster
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The speedometer is cable-operated so electronics have nothing to do with it but the other gauges can be inop because of a fuse. On the automatics, the instrument cluster shares a fuse with the tranny kickdown and is located on the lower right corner of the fuse block. I believe it uses a 20A glass fuse.
As for the speedometer, it may be easier to remove the cable at the transfer case end and spin it from there. Most likely it has a broken cable if it doesn't work at all. Also, check and see if you have a cylindrical object with a wire on the inside of your left inner fender where the speedometer cable goes in/out of. I had one of these on my J4000- it is a spedometer controlled spark switch- and it went out on my truck causing the speedo to read zip. I believe that there was a very early service bulletin on these units to unplug the electrical portion; it was unplugged when I got my J4000 but the actual unit was still there so the speedo would work. I removed it when it finally broke internally and replaced with a one-piece cable from a 78 J10.Patrick V.
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73 J4000 "The $LUT" 360 V8 bored .040 over Edelbrock 2131 1407 4V carb K8600 cam Dual Flowmaster 40 mufflers TH400 QT 3.73 Dana 44s
78 Cherokee Chief WT "Old Blue" 360 V8 4V TH400 QT RIP
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