Need '04 wiring information

[fastblackmerc]

Anyone know what color the wire at the PCM is for the speed signal? Also need to know if the speed signal is square or sine wave.

Thanks in advance! :beer:

[KilledKenny]

Anyone know what color the wire at the PCM is for the speed signal? Also need to know if the speed signal is square or sine wave.

Thanks in advance! :beer:
Our cars get the speed signal threw the ABS system threw the module communication network. The PCM then sends an output signal to the Instrument Cluster, Speed Control Servo and the Radio. The wire color to all those modules is Gray/Black. As far as the output signal I'm not quite sure, our book just tell the input signal. I know the input to the ABS module from the VR speed sensors is a sine wave. Easy way to find out the output signal from the PCM is to monitor the Gray/Black wire at either the Radio or Speed Control Module. Hope that helps.

[fastblackmerc]

Our cars get the speed signal threw the ABS system threw the module communication network. The PCM then sends an output signal to the Instrument Cluster, Speed Control Servo and the Radio. The wire color to all those modules is Gray/Black. As far as the output signal I'm not quite sure, our book just tell the input signal. I know the input to the ABS module from the VR speed sensors is a sine wave. Easy way to find out the output signal from the PCM is to monitor the Gray/Black wire at either the Radio or Speed Control Module. Hope that helps.
One more question. Where's the PCM located?

[KilledKenny]

One more question. Where's the PCM located?
Under dash on the driverside, far left on the firewall. The wire connector is on the other side of the firewall under the hood.

[fastblackmerc]

Under dash on the driverside, far left on the firewall. The wire connector is on the other side of the firewall under the hood.
Big sliver box I assume?

[KilledKenny]

Big sliver box I assume?
Correct :)