GPS in a 05 Jeep

I have all of wires installed on my new instillation of a GPS unit except for 1 wire, I am having a hard time locating the Vehicle speed pulse signal cable in a 2005 Jeep Grand Cherokee Laredo. Can anyone out ther help me locate this wire?

The speed sensors are on the wheels.. You can either:

1) get under the rig and find the sensor and test with a meter

or what I suggest (2)

2) Soundgate makes a C.A.N. bus interface for chrysler that will pull VSS info right off the data bus in the vehicle. This would be the easiest solution.

Im glad I tint

i had to do one about 3months ago your best bet is a speed pulse generator