teammcw wrote:
You can extract the two wires OUT of the harness (there's usually locking tabs holding the wire in the harness). Being careful, you can disengage the tabs and pull the wire out.
Once out, you can do the mod without having had to cut the wire (allowing you to restore it to factory if needed).
This is true and I too thought about trying that approach. Yet,,, once you get those wires/small terminals out of the connector, you would need something near identical to stick back in the connector to make contact with the head unit pins etc.. You also need to remember, it's the head unit side you need to ground/switch etc., not the harness side. (Once you get your hands on the connector you realize it would be very difficult etc.) -Its to bad no-one has created an aftermarket plug-n-play harness. It would be worth the most likely $100 price tag that most run.
The only way you can approach this is: mitigate the risk by performing the job well, and if and/or when something goes wrong - if you caused it take responsibility and get out the checkbook. If it had nothing to do with your mod then work (OK fight), with the dealership to fix it under warranty.
From all of Timmbo's other threads/referenced chats (and other forums-info) on this topic with other folks that have performed the mod on different Nissan vehicles, I didn't see any that ended up with a component failure. That and studying the tech manual and functions of both speed sensor and brake leads I found the mod to be near risk-less. All of this and the pure fact I wanted our Mo and audio/video to function the way I wanted it to function resulted in me cutting some wires.
Now, I/we just enjoy it when desired and hope/pray I don't have to argue with the Dealer about a "related" warranty issue for the next 27K miles...
You folks with a lease do have a slightly different issue/considerations - not the risk side (that's the same :-( ), just the fact it's not "really" your car and you would/should have to reverse the mod prior to turn in.
Cheers