Question about 2004 Ford Focus
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Posted on Jan 02, 2017
The VSS (vehicle speed sensor) sends the signal that activates the speedometer. Interestingly enough the signal is also sent to the radio to adjust the volume for road noise. That would explain your perception that it is worse when listening to the radio. Now, solving your problem may not be as easy as following the link between these two devices, but I would check the vehicle speed sensor first.
Posted on Jul 22, 2008
SOURCE: focus speedo fault
a speedo problem,take dash out ,spray it with wd40 and it will last a bit longer,but you will end up having a new one,if its still under warranty take it back
Posted on Oct 19, 2008
This is caused by the little circuit board that runs the speedo or a Vehicle Speed Sensor problem, have any Kragen auto or Auto Zone run a trouble code test to see if a VSS trouble code is present in the memory, if nothing shows replace the speedometer or have it repaired, if there is a code for the VSS replace the sensor on the transmission.
Posted on Dec 03, 2008
it may have a static charge in the instrument cluster,try un-hooking the battery then turn the key on and even hit the brakes to try to drain the spark out of the system,hooking the 2 cables together with the battery disconnected may work as well to drain it.hook up the battery and see what happens,but make sure the key is off and nothing is on-lights,radio,wipers etc,it could send a spark to the computer.
Posted on May 31, 2009
It could be a spark plug, plug wire, or a coil. Sometimes thay break down intermittently. If it needs a tuneup, that would be the first thing to do.
Posted on Jun 20, 2009
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