Quote:
Originally Posted by rdinatal
The signal is available and can be used. Now I need a day to find it.
-R
Vehicle Speed Signal
Note: If non-OEM tires are mounted on the vehicle, the pulse per mile frequency will change.
Note: Any device connected to the vehicle speed signal (VSS) circuit will require a high impedance of at least 1 megaohm. If this speed signal is compromised (by using a device with low impedance), the navigation system may not be able to show the correct position of the vehicle as accurately.
The vehicle speed signal (VSS) is sent from the brake system control module to the navigation system through circuit 679 (GY/BK). If the vehicle is not equipped with a navigation system, circuit 679 (GY/BK) ends in connector C210 pin 5. With OEM tires on the vehicle, the signal is 31924 pulses per mile.
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Notice it says the if there is no NAV the signal ENDS in connector C210 pin 5. I'm guessing that means the harness that goes to the back of the radio doesn't have a pin that is VSS unless you have a NAV. You probably have to go back to the computer (wherever connector C210 is) to tap into it there... So you might have to run a wire through the firewall (where is the CPU on this thing? I'd guess in the engine compartment but its a guess.... there are a ton of wires leading from the engine compartment to the firewall as I recall.