1999 bmw 528I mirror WIRING CIRCUIT schematics COLOR CODING?

Question

PLZ TELL ME WHAT EACH OF THE COLORS APPLY TO ON THE DRIVERS SIDE DOOR

Answer 1

You should see 5 wires.

2 for the heating element (if you have heated mirrors).
3 for the mirror control motors.

My E46 manual shows that you may either see one of the following cases below (depending on which side mirror it is... it was a little vague on the sides). If you see 3 black and 2 brown wires, it's going to be really hard to tell which is which if this is the case. I'll list it anyway...

Black - heating element ground (-)
Black - Heating element (+)
Brown - motor 1 (+)
Brown - motor 1 & 2 common ground (-)
Black - motor 2 (+)

....or if you're lucky, you'll see:

Brown - heating element ground (-)
Green/black - Heating element (+)
Blue/white - motor 1 (+)
Blue/green - motor 1 & 2 common ground (-)
Blue/black - motor 2 (+)

Unfortunately, it doesn't say whether motor 1 or 2 controls the vertical or horizontal... and I'm also hoping the wiring of the 528i is similar to the E46.

But, if the above colors don't match and you wish to test out wire-by-wire, use a 9V battery and hook it up to the wires in pairs. There's no risk of shorting because each wire is connected to either a motor or the heating element. You'll see either;

- 1 motor moving (you got the correct wire pair for that motor)
- 2 motors moving slowly (you got both + wires from the 2 motors and you missed the common ground),
- nothing (you got one wire from the motor and one from the heating element) or
- the mirror warming up (you got the correct wire pair for the heating element)...

you can then figure out which is which.

Hope this helps, good luck!