Looking at the diagram you're measuring resistance through a coil of wire between pin #1 and #2 on the connector. The magnet is out of the picture.

 

I just did the two rear ones that are run through the rubber seals in the floor pan. There was no continuity or resistance on the two pins in the connector..

I was going to do the fronts yesterday but I only see where they go through the wheel well, and the right-from-front one I think has the connector right there, but the left isn't on the well it seems.