hi all.. i installed my z2 and hooked up the dimmer wire and it does nothing. i checked the wire and its hooked up and to the same wire that was hooked up to my n3. i have a 2008 f350.. i also hooked up the vss wire and most of the functions on that screen work, like the mph and volts. but a few dont work, like the direction.. does that mean i dont have the right vss wire ? or what ??
thanks..
Dimmer: Make sure that you have the correct wire. the best way to check that would be to get a test light or digital volt meter hook up to the wire you have and turn on the parking lights it should go to 12v or it will go to ground. I know that ford likes to put 3 wires for illumination and dimmer.
the dimmer wire will dim you head units light for at night when turn on the parking lights.
VSS: I think that it is a grey/black wire behind the radio but i could be wrong. If your speed is comming up on the z2 and it is the same as your speedometer than it is correct. i do know that you have to drive it for about 2miles making left and right turns so that it can learn.