Light switch, (10): Connection
The light switch is directly grounded to the body. The 2 pins of the lighting knob are supplied 10.2 V separately via a 1.2 kOhm (parking light setting) and a 1.5 kOhm (headlamp setting) resistor integrated in BCM. Voltage between each pin and ground is 0 V when the circuit is closed to ground and approx. 6 V (parking light setting) and 5.5 V (headlamp setting) when it is open. If the control module reads 10.2 V, it will interpret it as a break. The LEDs are grounded internally and are supplied with PWM-regulated voltage from BCM.
LIGHT SWITCH PIN SIGNAL DESCRIPTION
| Pin No. | Signal type | Description |
|---|---|---|
| 1 | Headlamps | To BCM. Grounded 2 steps from knob's right end position (when knob points straight up) |
| 2 | Parking lights | To BCM. Grounded 1 step from knob's right end position |
| 3 | Lighting | From BCM, power supply with PWM to LEDs |
| 6 | Ground | Supply |