Safewatch 3000 System says "Check xxxx door". How do I check with multimeter?

I have a Safewatch 3000 that came with the house. Having never used it, I thought I’d start using it and added the EVL-4. I also just replaced 3 batteries which fixed the low battery warnings.

Now that the warnings are gone, it’s telling me to check those doors whenever I open the door. My door sensor looks like an older Honeywell 5816 that needs a screwdriver to push in a small pin to open the case. The inside looks like this newer version. There is one definite difference though … my magnet is embedded in the door and not in a separate small box … https://images.ctfassets.net/0qi8jj3gstfw/2koRF6EYaNIATdgXs7KRE3/cf12ef205f32413293706cc69d1163bb/Honeywell_5816.1.jpg

I saw a post recently about testing with a multimeter. Do I just look for continuity across the wires for the reed switch? For a good sensor, would there be no continuity for open door and continuity with closed door?

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