What should I do if my speedometer needle shoots up?
Although it usually takes a mechanic to be able to fix this problem, you can do some simple troubleshooting for the speedometer needle so you have an idea of possible causes and what to expect. Scenario: you are driving at normal speed when suddenly your speedometer needle shoots up by 10, 20, or even 40 miles an hour.
What should I do if my speedometer says 60 mph?
For example, if your speedometer is showing 60 mph and it should be showing 52 mph, you will need to use a driven gear with more teeth to spin the speedometer cable slower. In this case, you need to add three teeth. But, a perfect combination is not always going to happen.
What should I do if my speedometer is making noise?
Try turning the SN74 switch #2 ON to filter the noise out of the signal. If SN16 is being used, test by turning shaft with a drill to see if speedometer responds. The signal can be monitored by connecting a multi-meter set to DC volts between the signal post and ground post of the speedometer.
Where does the speedometer go in the transmission?
There are two gears in the transmission that make the speedometer work. The speedometer cable gear (driven gear) is mounted within a sleeve/housing that goes into the side of the transmission’s tailshaft housing. This is where the speedometer cable attaches to the transmission.
What to do if speedometer needle jumps up and down?
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. That should cure it… The speedo cable for those old cars is like a spring.
What causes a car speedometer to stop working?
Possible problems: if it is an older car that has a cable for the speedometer, the cable may be damaged and the wire inside it broken or bent. If the vehicle has an electronic gauge, the cause may be a connectivity problem on the instrument cluster harness. The gauge itself could have stopped working.
How can I remove the speedometer cable from my car?
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.