I just got a knocklink and Bosch sensor and it says in the instructions that a two terminal sensor such as the Bosch has one terminal for signal and one for ground, and to determine which is ground to do a continuity test between the sensor body and the terminals. Trouble is neither of my terminals show a connection to the sensor body.
Anyone else experienced this or have I just been sent a duff sensor?

Whats the part Bosch number of the sensor ?

I had this with mine, and contacted BRD. Apparently it doesn't matter which way round you connect it. I put mine with the brown wire to connector 1, and the black to connector 2.
Alcazar