Tip & How-To about 1990 Plymouth Acclaim

To fix a dancing speedometer.

There are several causes for what I have found to be a common problem with these vehicles. That problem is a speedometer that bounces around and can quit working altogether.

In my case the issue was at first a wire that had been stuck to the engine block and started to short, I simply zip tied the wire onto something that was not metal and did not generate heat. The next time this happened I had to replace the part that the wire ran to. I will call this a speed sensor.

The speed sensor is very easy to replace and requires only about twenty minutes if you take your time. Remove the air cleaner first. It's not actually in the way and the speed sensor can be removed with it in place but you will have much more room to work with if you take it off. There should be two bolts holding the speed sensor in, undo those and pull it out. Detach it from the wires attach the new speed sensor and re-install. Now your cruise control should work again without making the car buck and kick the whole way.

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The speedometer bounces and sometimes does'nt work at all, and odometer hasn't changed sametime


Right off the bat it sounds like a broken speedometer cable. As the cable spins from the gearing of the transmission it is clicking against the broken part of the cable running to the speedometer gauge. The frictional clicking is what's causing your needle to bounce around. Since the cable is probably broken and cannot spin long enough to move the odometer numbers. Raise your vehicle safely and disconnect the speedometer from the transmission. then see if you can pull the cable out of the housing. If only a portion of the cable comes out, then that should answer your question. Be careful when you disconnect the speedometer cable from the transmission as not to lose any small pieces that cause the drive mechanism to work.

May 08, 2016 | Cars & Trucks

1 Answer

The speedometer in my 2002 chevy prizm stopped working. From what I can tell that is the only issue. I'm not sure if it is a fuse or a relay or something different altogether. It does tend to just bounce around speratically but doesn't tick away the miles. Help me if you can, thank you.


Sounds like a broken speedometer cable. The bounce around erratically, because the cable is still connected under the hood and still spinning. Even though its broken the two ends make contact and still causes some movement of the speedometer.

Usually runs from the transmission through the firewall and into the back of the gauge cluster.

Sep 24, 2011 | 2001 Chevrolet Prizm

1 Answer

my speedometer needle bounces around


Most likely your speedometer cable is bad. Good luck.

Jun 25, 2010 | 1996 Oldsmobile Cutlass Ciera

1 Answer

vehicle speedometer fluctuates when vehicle is idleling. specially when vehicle is cold.vehicle runs.


Battery cable problems let the grond connection ( Bounce ) This connection is in a service bullitin and it can cause altenater problems. Auto parts stores can check the altenator and the battery in the car. The bad connection causes a ground ripple that backfeeds the senative speeometer and needs to be fixed as this same current is hurting other things, you just can ( see ) it on the speedometer

Aug 21, 2009 | 1998 Cadillac Catera

1 Answer

transmission,and speedometer,check engine light problem


I found the information,as I searched a little further on the Internet,it turns out to be a fairly common problem which is, the speed sensors with the outlet being the most common one to fail but the inlet can also, a relatively cheap fix.

Jul 05, 2008 | 1999 Chrysler Cirrus

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