Speedometer quit working - 2005 Infiniti QX56

The two main reasons are here.

https://www.google.com/search?q=2006+FX35+Infiniti.+The+Speedometer+quit+working

The most common reasons an INFINITI FX35 speedometer isn't working are the vehicle speed sensor (VSS), a faulty speedometer, or an electrical issue.

..

There is a plastic gear in the speedometer that eventually breaks on mechanical speedometers called an odometer drive gear. This will involve removing the speedometer from the instrument cluster in the dash.

its located on transfer case rear end near propeller shaft , have 3 wires plug

SPEEDOMETER TROUBLESHOOTING

Can be loose speedo wiring connectors under instrument panel or its issue with speed sensor on transmission.

I suggest you to go through help links mentioned below with appropriate solutions to confirm the problem :------

How to trouble shoot speedometer?

http://schematicsdiagram.blogspot.com/2011/06/speedometer-not-working.html

-----------

1996 fiat bravo speedometer not working?

http://technoanswers.blogspot.com/2012/01/1996-fiat-bravo-speedometer-not-working.html
------------

Speedometer works but odometer not working?

http://technoanswers.blogspot.in/2012/01/speedometer-works-but-odometer-not.html

-----------

Speedometer runs backward?

http://technoanswers.blogspot.com/2012/01/speedometer-runs-backward.html

-------------

Warning lights on and speedometer died?

http://howtobyme.blogspot.com/2011/08/warning-lights-on-and-speedometer-died.ht

-------------

Speedometer not working on 1993 Ford F350?

http://repairhelpcenter.blogspot.in/2012/02/speedometer-not-working-on-1993-ford.html

----------

ABS & Brake lights warning indicator steady on dash and speedometer not working for Dodge Ram?

http://howtobyme.blogspot.com/2011/11/abs-brake-lights-warning-indicator.html

-----------

Vehicles Cluster panel Not reading Miles?

http://schematicsdiagram.blogspot.com/2011/12/vehicles-cluster-panel-not-reading.html

-------------

Odometer works properly but speedometer works intermittently?

http://technoanswers.blogspot.com/2012/01/odometer-works-properly-but-speedometer.html

-------------

These will help.

Thanks.

The odometer quits working when the speedometer quits working. The most common cause for the speedometer to quit working is the speed sensor in the transmission. You said you replaced it, there is also a transmission speed sensor on your truck that may need to be replaced. I understand your frustration, but there is nothing else that would cause the speedometer to quit except the cable behind the gauges being clogged.

It is most likely the speed sensor in the transmission.

check your speedometer cable, unplug it from the transmission and replace it, that should take care of it.

this car uses an electronic speedo head, u must rmove the speedometer from the dash and send it in for repair at an authorized ford electronics repair center.

You need to replace the speedometer gear that drives the sensor.

I installed and after market stereo and my speedometer quit working 1999 chevy s10 blazer