The short answer is, there's not a lot the shade tree mechanic can do with the electronic speedometer. Check the sending unit (rear of the transmission) for loose/damaged/dirty connections or wires. IF there's nothing obvious wrong (it ate a huge rock at some point,etc.) the next order of business will be to track it thru the wiring harness, looking for loose conections or a bad ground connection. There's about a jillion grounds woven into the harness. Check and tighten/clean them all, and you might get lucky. The biggy is the 'bulkhead connector'...most,if not all, the van's circuits go thru this octopus. It's usually securely clipped together...maybe it's come undone. My '87 has about 70 numbered circuits, and there's empty slots in the plug. Some circuits go thru it TO the fuse block AND back out. It can get confusing... If this sleuthing does not help, steel yourself for a long day and pull the dash apart, noting carefully where all the screws and clips live. It'll help when you go back together. I'm betting the answer will be a cracked/broken lead in the circuit board(s) that comprise the speedo cluster. Whatever you do, don't blow a gasket and start ripping things apart!!! That's an absolutely bullet-proof way to turn your van into 'spare parts! If you can't find an obvious cause, turn it over to a speedometer shop, detailing exactly what you looked at. . Mike Bell Sometimes it's just a fuse. The guage is lit up by fibre-optics. There are 2 light bulbs which burnt out on mine, and I could'nt see the numbers on the guage. I could see them when the sun shone directly on the guage. It's not hard to change, try that.
The speedometer is cable driven.
It is an electric speedo so it can be the speed sensor or in the speedo itself.
Need to figure out what's wrong with them, first.
It does not have a cable... It is electronic controlled. It has a sensor that is bolted in the drivers side of the transmission TAIL SHAFT that controlls the speedometer among other things.
a4ld
The best way is to buy a book on your model and see if you can do it. Then! Ask again on this sight for help when you feel confident that you know what your doing to repair the speedometer.
Back in 1991 I THINK that they still used a mechanical cable from the transmission to the speedometer. Only later did they change to electronic readout, but I'm not sure what year. It sounds like the speedo cable needs to be lubricated, possibly replaced.
The speedometer cable (which runs from the transmission to the dashboard) has snapped. This is a two-piece cable, and the one-piece cable in later Proteges will not work. I had the transmission replaced, and the cable could never be fit in properly. This is a mechanical speedometer, so you would have to change the entire speedometer part of the instrument panel to use a magnetic/electronic speedometer.
Yes. The sensor on a 4 cly is on the back of the transmission on the passenger side near where the right drive shaft comes out. On a V6 it is on the other side.
A 1991 dodge dynasty speedometer bouncing could be a sticking speedometer cable, or a bad drive gear. Check the cable first, and lubricate it to see if the problem stops.
The 1991 Geo speedometer cable is held in place with a swivel nut on each end of the cable. Turn the swivel nut to the left to remove the speedometer cable. Reverse the process to install the new speedometer cable.
you have to take out the intrument cluster and replaced the light bulbs that are inside the instrument cluster!...its really simple