Thanks for your reply.
Yes I used the adapter harness to connect the stereo to the factory connection. It has the label on the pioneer system on the wire as speed sensor and reverse signal but I dont know where to connect these wires.
I found this in the manual "Violet/White (REVERSE GEAR SIGNAL INPUT)
This is connected so that the navigation system can detect
whether the vehicle is moving forwards or backwards.
Connect the violet/white lead to the lead whose voltage
changes when the shift lever is put in reverse. Unless
connected, the sensor may not detect your vehicle traveling
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