I have a 92 honda civic and the speedometer only works when it wants to, sometimes when I'm driving down the road it jumps back and forth between zero and 120. Most of the time it just sits on zero the whole time.

. Check all under-dash fuses with a test light or multimeter.

. Check/replace the Variable Speed Sensor (VSS), and connections, on top of the transaxle.

I read another user's solution and after trying many things... YOU HAVE TO TRY THIS.

Look under the hood and find some wiring grouped under the intake. The wiring has been rubbing against a metal piece and this rubbing has caused the wires to be bare. The short is hurting the operating of your speedometer. With some electrical tape and some effort you can fix this in 20 minutes. Wrap the electrical tape around the wires where the wires are rubbing against the metal piece. It will be obvious if you get your elbows a little dirty.

Otherwise you can try and replace the VSS and Speedometer only to be out hundreds of dollars and still have a faulty speedometer.

I did it tonight, and after months of anguish I fixed my 98 civic.