Was wiring my Backup camera and BT audio last weekend and noticed that my 2008 Tacoma was prewired for the VSC & DAC switches. Got me wondering if that was just software upgrade to the vehicle and if so has anyone done it yet? Any advice/suggestions and how to and if this is worth doing would be greatly appreciated.

sorry, there is lot of pre wiring but nothing at the other end !
varable speed wipers and such are usually the same way and fair amount of fog light wire is already there

it is a lot easier to have the extra wiring harnesses than have to add all the wiring to do a upgrade at the dealer, and not worry about building with several different harnesses