Does anyone have the wiring for this switch? This version of the switch has both the HUD (Heads Up Display) and AHB (Automatic High Beams) buttons. The switch has 10 pins connected to a 12-pin connector. This is what I think I know so far: Pin # Wire Color (purpose) Pin #1 Green (?) Pin #2 ? Pin #3 ? Pin #4 Black (?) Pin #5 White/Black (ground) Pin #6 Red (power) Pin #7 ? Pin #8 ? Pin #9 ? Pin #10 Yellow (powers the AHB LED light) Appreciate any help. Thank you
The correct pin organization, facing the female plug with latch at top, should have been*: Pin 1 Red (likely illumination positive tied to dimmer circuit) Pin 2 empty** (connects to pin 6 while HUD button is pressed) Pin 3 empty** Pin 4 Black (a negative return) Pin 5 Yellow (positive feed for AHB LED when AHB button has been presed) Pin 6 White/Black (ground; negative return for pin 5) Pin 7 empty** Pin 8 empty** Pin 9 empty** Pin 10 Green *and also pretending holes 1 and 7 of the 12-hole female plug don't exist because the multi-switch only has 10 pins. **empty in my LE wiring harness.
The HUD LED seems to be turned on by some logic either inside of the multi switch or the car's ECU (or both). There doesn't appear to be any connection to the HUD LED from the 10 pins on the switch. Options: 1) install another little LED in there, or 2) "hotwire" the existing LED for my own needs. Neither sounds particularly appealing. (sigh) This is wiring analysis I have completed: Pin #1 (Red wire) Function:Illumination(-) Pin #2 (empty in LE harness) Function:HUD button(+) with pin 6; While HUD button pressed:0.03 volts. Pin #3 (empty in LE harness) Function:AHB related with pin 5; While AHB turned on:0.03 volts. Pin #4 (empty in LE harness) Function:Illumination(-)? Diode drop to Pin 8; illumination-only behavior in car. Pin #5 (Yellow wire) Function:AHB LED(+). Pin #6 (White/Black wire) Function:GND; AHB LED(-); HUD button(-). Pin #7 (Black wire) Function:AHB related with pin 3; While AHB turned on:0.03 volts. Pin #8 (empty in LE harness) Function:Illumination(+)? Diode drop from Pin 4/Pin 10; illumination-only voltage profile in car. Pin #9 (empty in LE harness) Function:Unused. Pin #10 (Green wire) Function:Illumination(+) tied to dimmer circuit.
