i got some m3 style mirrors for my 92 civic but didnt get the wiring diagram for it. it has a blue wire, white, and black. dont know which is which.

 

The black wire is ground. Out of the other two wires, one is dim (parking lights) and one is bright (signal lights). Grab a 9V battery. Neg to the black wire, and Pos to the blue, then to the white. Which ever connection lights the LEDs up brighter is the one for the signals.

 

Thanks man. tested it on a 9v and found out which is which, but do you know which wire is which on the actual cornor light. i know black is ground but there is a red wire with black stripe and green with blue i think... didnt write it down.