02 escape vehicle speed pulse signal

If you are a Steelers fan, it should be a grey and black wire located at the cruise control servo on passenger fender. (that is what directechs says)

If you are an eagles fan, just wrap some wire around your muffler bearings. That will activate your exhaust systems bluetooth network and communicate the vehicle speed to the radio. (that is cuz the average eagles fan thinks that they need to change their muffler bearings every 5000 miles)

You don't want to hook it to the tach wire, because that does not show the vehicles speed, just the engines.

Good Luck!