Garage door opener works with remote but not switch
OK, so I finally removed the &quot;dry contact relay&quot; wires, tested them for continuity, and reattached them in reverse. It all worked. My suspicion is that the &quot;dry contact relays&quot; have a &quot;common common&quot;, meaning all the relays rely on a joint &quot;common&quot; (even though they all have a separate common terminal....) So, when I connected the relay reverse of how I connected the other garage door opener, I inadvertently ended up &quot;shorting&quot; the second garage door opener. Still not sure why it worked that way, but all's well that ends well, eh?