I have been installing all new speakers, amps, and a new head unit. I have all connections now without running wires directly to the speakers. They can be tapped without taking out the trim. Door panels have to come out, obviously, but not difficult at all. All amp wires can be ran w/o taking out the trim. There is one wire I can't find....Where is the speed sensor and how do I reach it? If anyone needs help please let me know. I found very little useful info on this forum to help with this setup. I had to test ea. wire and phase, but got it. I did skip the center channel and rear pillar speakers, but they are pretty worthless with a good system. 8.1 setup.

If anyone can find the speed sensor and how to reach it, please let me know!

 

Post some pic of your install if you can. I just switched out my head unit & added a 10” sub. All factory speakers are being used. Eventually I’ll switched out the factory speakers as well. Make sure you tap into the dimming wire (orange with white stripe) in the harness so the head unit dims when your headlights come on. I skipped that part & now I’m paying the price with a bright-*** screen at night

 

LOL. I did not add the dimming 12V wire, but my deck brightness is adjustable, so no problem. I just need the speed sensor????? I'll let you know how I did everything when It's all done. I can tap the speed sensor at the tranny, but I can't find a way to route back to the deck without drilling under the car. I'm not doing that. ANYONE know what to tap at the speedometer and how to find it? Please?

 

Is there a mute wire anywhere? If so, can you let us know where you found it. Thanks

 

Sorry, I doubt anyone here will have this answer. I mess around with the wiring a good amount on the Cayenne and drawing a blank here. There is a reference sensor in the bell housing of the tranny on the left side that measures (through hall effect) the rotation of the flexplate/flywheel. Not sure if this is used as the crankshaft sensor or speed sensor. I suspect that the speed sensor is data sent over the canbus to the various computer modules, but cannot say for sure. If this is true, then you would be chasing a ghost.

Just curious, but why do you need a speed sensor for a headunit? For navigation? If so, don't they use GPS?

 

It helps the GPS be more accurate on bad weather days or tunnels. I did not hook it up, but the GPS has been just fine without it so far. Getting my full system in has made me love the CTT 100 times more. I also added a flip down DVD player for the kids. Those factory speakers are just terrible.