You have an electronic speed sensor.
It is a 3 wire plug, verify you have power (5V) and a ground to that connector with the key on RUNII. Also, with the wheels spinning you should see a signal from the remaining wire. If there is no signal the sensor is bad.
If the signal is good and circuity leading to the cluster is fine, you have a faulty cluster.
Hope this helps.
Wednesday, February 25th, 2009 AT 7:26 PM