In order to locate the speed sensor for the N1, you need to remove the bulbous plastic cover from underneath the 2nd din area (under the lighter). Here you will see 3 main wire plugs with many different colored wires hooked into them. Starting from the left is #1 plug and so on towards the right. I had some help from a guy who worked at Best Buy auto stereo installation in determining the correct wire. According to his electronic schematic wiring instructions, it calls for the light green wire with a white solid stripe located on the far left (#1) plug. We both looked through all the wires in #1 only to find that it was wrong. So we decided to look through the #2 and #3 plug and sure enough it was on # 2 (middle plug). What we did to make sure it was correct is spliced a volt meter into it and drove around to see the readings move. If there's no readings while moving, it's the wrong wire. It should start changing the reading while driving and will change variably in different speeds and the same when you come to a stop.



What you may do to search for this particular wire is to dig deep as it was buried in the back. I forget which pin# it was on the plug but I think you can find it in the archives that was mentioned briefly under speed sensor. Here you can see the Pioneer pink wire spliced into the light green wire with a solid white stripe.



If no one wants to mount their GPS antenna on top, run the wire to the far left side of the dash board and place the magnetic antenna on top of the metallic portion of the dash near the vin #plate closest to the windshield. The reception is perfect and the mount is very inconspicuous.



I cannot guarantee that the #2 plug will contain your green/white wire. But that's where it was for mine even though the schematic says otherwise. Also, make sure that it's the light green wire as there are other darker than light green wires with other colors included.

As a quick review, I've installed the unit within a couple hours but took me 3 days as I had to remove the older generation Pioneer a/v system with all the wires and brain unit. This unit is very easy to install and the interface is also quite intuitive. I tested the unit out for the San Diego VX meet this summer and it worked out great. I felt more confident of not getting lost anymore and being able to find gas stations and or other public facilities a breeze. Also hooked up my current Panasonic DVD player and was able to switch back and forth from the DVD playing and the GPS disc while driving.

Good luck with the hunt and hope this helps finish your electrical wiring. You're going to love it!!!