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Message: <blockquote data-quote="Rtfm" data-source="post: 1469340" data-attributes="member: 20804">Ryan, check the cruise control function to see if the signal gets to the ECM. The signal from the speed sensor goes straight to pins 11 and 12. See if you can get a low resistance (less than 1 ohm) path against a ground from pin 11. Check with an AC voltmeter across pins 11 and 12 when the car is in motion to check for a signal voltage. It should read over 1.5 volts or better with a forward speed of 10 mph or more. If you have no signal between those pins, check pin 12 and a good known ground for the AC signal from the speed sensor. If no voltage, then remove the sensor from the transmission and spin it up using a drill and you should get 6-9 volts out of it easily. If no voltage that way, the sensor is bad.I can walk you through testing the speedometer on the bench, too. If you have signal across pins 11 and 12, then your speedometer should work if you are getting power from fuse 8 to the switched power (pin 16) and constant power through pin 13.</blockquote>