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Hello, My speedometer is not working. I can make the speedometer needle move using an electric drill at the transfer case side of the speedometer cable. I took the plastic speedometer gear out of the transfer case and I could turn that plastic gear by hand with the speedometer cable attached and could make the speedometer needle move. But when every thing is put back together and I drive the jeep the speedometer doesn't move. (1984 JEEP, J10, FULL SIZE JEEP, PICKUP TRUCK, WITH 6-CYL., 4-SPEED-MANUAL-TRANSMISSION, PART-TIME-4-WHEEL-DRIVE)
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dealer might be able to fix with the computer diagnostic tool. If there is a push button to reset odometer you can take a small wire and try and feed through the hole and raise needle above the pin. removing the instrument cluster cover is a pretty big task, if you cant find a place to insert a wire, only bypass I can suggest is drilling a tiny hole in the instrument cluster cover off to the side or top wherever the hole is least bothersome to you and then use a wire to raise above pin, after put a little clear silicone or a piece of tape over the hole to prevent dust building up inside the cluster
Depending on which end needs to be reattached, At the Speedometer Head or at the Transfer Case, or at the Cruise Control Module (if equipped with Cruise Control).
At the Transfer Case : Underneath the truck, on the left side of the transfer case, near the tail housing/rear of the transfer case (if it's a NP203 or NP205), there should be a small rectangular box threaded onto the transfer case, the other end (facing away from the transfer case) has a threaded end on it where you'll thread the end of the speedometer cable on.
At the Speedometer : Behind the instrument cluster, protruding from the back of the speedometer, is a round male port that the speedometer cable snaps onto. You just push it onto the back of the speedometer and it locks into place. Some cables have a metal end for the Speedometer end, some have a plastic end. The ones with the plastic end will sometimes break and won't stay locked in place at the speedometer.
If it's equipped with Cruise Control, you'll have 2 Speedometer Cables, an Upper Cable (From the Cruise Control Module to the Speedometer) and a Lower Cable (from the Transfer Case to the Cruise Control Module.) Both ends of the Lower Cable have Female Threaded ends (one to thread onto the box on the side of the transfer case, one to thread onto the Cruise Control). The Upper Cable has one threaded end and one Clip On/Press On end. Reconnecting the cable is the same as the methods I mentioned above, but with 2 additional threaded connections on to the Cruise Control Module (which is usually found on the Fenderwell in the engine compartment)
When you say the speedometer does not work, do you mean the needle is stuck at certain speed or is at zero all the time.. If it is at zero all the time, replace your meter. If it's stuck at certain speed, give it a knock with your fingers. And if that do not work, drill a pin hole with a fine drill just above the position where the needle is stuck and using a fine thin wire, push the needle back to zero position.
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.
when you had the dash on its way out it got tilted and the free moving hand in the speedometer floated around the ring, now you have to remove the cluster and hold it up side down to get the needle to float back to the other side of the stop pin. or, drill a small hole at the base of the speedometer and take a piece of wire to move the needle, good luck
Pretty common problem with these. Here's a guide to learn how to fix GM instrument clusters yourself, I used it to fix mine and it worked great.How to guide for Tahoe instrument cluster repair
About the only way is to diassemble it, but it sounds like it's not wrth doing. Your speedometer is having some real malfunction issues anyway. Might as well get a new one (or used). If you did get the needle to the right place, it's just going to end up in the wrong one again.
?? Does it move on the road ? You could have a worn out CV joint that allows the transmission to free-wheel. If that is the case, replace immediatly, or the transmission differential will fail.
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