Is this a valid test for an 87 300E?

"The flywheel sensor (L-3) is located on the driver's side of the "transmission to engine" bell. The wire snakes up around the oil filter and eventaually connects to the KLIMA relay (and MAY also be connected to the overvoltage protection relay - it is in 201s). The low voltage AC signal (small fraction of 1 V) can be monitored and the resistance of the sensor coil read at relay socket pins 1 & 2. Resistance should be ~1.9k ohm." Can it be read at other locations like the multi pin connector on the left fender well or even at the pins connecting the tach?
I'm supposing that each test along the line would eliminate a previous component from being bad.
Also, I read somewhere that an Ohmeter set at 1K will allow you to test the tach by making it jump. Is this correct also?