When they find out I’m not a good electrician 
Using the attached photo/info and a multimeter, how would the experts test the dusk to Dawn switch on the right side of the box for power in/out? Verified the outlet has 120v, getting no reading from COM to “13V” where the power leaves the D2D switch and terminates

Using the attached photo/info and a multimeter, how would the experts test the dusk to Dawn switch on the right side of the box for power in/out? Verified the outlet has 120v, getting no reading from COM to “13V” where the power leaves the D2D switch and terminates
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