The wire was running through a plastic shield which is loose on one end but still connected below at the tranny. The car also isn't shifting right when driven.
It goes to the PCM - engine computer ! It's probably for the VSS - vehicle speed sensor . What color wire ? purple , yellow .
Speedometer
The instrument panel cluster (IPC) displays the vehicle speed based on the information from the vehicle speed sensor. The IPC receives a class 2 message from the powertrain control module (PCM) indicating the vehicle speed. The IPC calculates the vehicle speed based on the class 2 message indicating the wheel reference speed from the electronic brake control module (EBCM) if:
• The PCM detects a malfunction in the vehicle speed sensor circuit.
• The IPC detects a loss of class 2 communications with the PCM.
The speedometer defaults to 0 km/h (0 mph) if the IPC detects a loss of class 2 communications with both the PCM and the EBCM.
Testimonial: "The wire is black and has a but splice connector crimped on one end so it looks like it was replaced before I got the car. Where is the PCM on this car?"
The speedo sensor is on the passenger side, mounted in the transmission, close to the axle. Only sensor there.
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The wire is black and has a but splice connector crimped on one end so it looks like it was replaced before I got the car. There is a purple wire that's broke off at the front off the car under the alternator going into the same wiring harness as the alternator wires. Could this be where the speed sensor wire needs to be connected?
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