GrandMarkie

I have completed the navigation install and everything works great...but I just never got around to connect C5 from the nav unit which connects to the tail light harness (Back Lt). Does anybody know what this actually does?

Username 0

Probably tells the navi brain that the car is either stopping or slowing down. im sure its so the navi can calculate a more precise position to show on the screen.

orrrrr maybe its for the reverse light. to tell the navi that the car is backing up. again, to get a more precise reading.

KaMLuNg

iTrader: (5)

have u tested the unit without it plugged in??? maybe that will give you a clearer indication of what it is used for... (i.e. if you are in reverse and it is not moving on the screen)... im pretty sure i had to hook up a reverse wire or was it a brake wire, on a aftermarket Pioneer Navi but i don't remember what it was for... good luck