Why does speedometer jump around?

Why does speedometer jump around?

While you are driving, if you notice the needle on the speedometer jumps erratically from one number to another, the speedometer cable is most likely damaged or the sensors on the driveshaft are not accurately sending the signal through the cable. If this occurs, the entire cable and housing needs to be replaced.

Why is my speedometer not working?

The most common causes of a speedometer that stopped working include are a faulty speed sensor, a broken gear on the speedometer, damaged wiring, or a faulty engine control unit.

Is there a speedometer cable on a jeep?

Jeeps don’t have speedometer cables, those haven’t been used in many years. Your issue is very likely (99.9999%) the speedometer gear was replaced and whoever replaced it didn’t rotate the speedometer gear housing far enough to get the speedometer gear fully meshed with the pinion gear inside.

What to do if your car speedometer goes off?

Nowadays, there’s a possible reset procedure that can be used, and it can be done by most car owners right at home. A common problem for this malfunction is when the car owner recently replaced the battery, or perhaps jump-stared their vehicle, which in both cases could have caused an electrical spike that made the speedometer go berserk.

How to disconnect the speedometer from the instrument cluster?

Caddyman July 6, 2016, 2:30am #5 Reach around behind the speedometer or remove the instrument cluster to gain access and disconnect the speedometer cable from the speedometer. Pull out the inner cable, clean and inspect it, coat it with light grease, or M/C cable lube and put it back together.

Why does the needle bounce on the speedometer?

The speedo cable for those old cars is like a spring. If it hangs up somewhere due to poor lubrication when it releases there is pent up energy so it “over releases” and creates the needle bounce you see on the speedo.