DESCRIPTION & OPERATION
The BMW Electrochromic ECTM Mirror automatically detects and eliminates glare coming from headlamps of following vehicles. The ECTM Mirror darkens gradually as glare increases. When glare subsides mirror becomes clear again. The ECTM Mirror has a 3-position switch (OFF/MIN/MAX) to turn on and select sensitivity of mirror. The mirror also has a Reverse gear override function.
Connector Terminal Identification
- Pin 1 is Vehicle chassis ground (Brown wire).
- Pin 2 is Reverse override (+12V, gear selector in reverse) (Blue/Yellow wire). Mirror changes to high reflectance when input is energized.
- Pin 3 +12V, IGN. SWITCHED (Green/Red wire).