I'm not sure it's the same as the diesel, I only have diesel and M104 powered 124s right now.

If it is the same, the green sensor has a single-pin connector, which is for the temp gauge, and a 2-pin connector, which turns on the fans, high-speed, direct / no relay. Low speed goes through a ceramic resistor behind the left headlamp and the high-pressure switch on the receiver/dryer next to it.

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Gone to the dark side

- Jeff