yes it's .7 volts to turn on the diode
Below that threshold the diode it turned off
So, since you have suggested you use a Fluke 87 series meter and the Fluke 87 series owners manual states that in the
To 4.0MΩ measuring range it supplies
<450 mV DC as the test voltage... FYI: Most digital multimeters supply this same half volt or less voltage on the Ohm setting so they don't damages stuff...
With that said, revisit the circuit I posted, what happens to the diodes when you are testing the resistance on each side with your multimeter and <450 mV DC? How does this effect you ability to test for the supply side 'short' when you are testing on the 'stage one' side of the circuit?
Have you been listing to us when we keep telling you that you NEED TO KNOW THE CIRCUIT you are testing? Have you been listening to us when we tell you there is no single black and white answer to how to test this stuff, the circuit will introduce variables and other issues that have to be taken into consideration and will vary test results...