I’m a little more than stumped on this one. Just took a factory switch apart as far as I could. I can see the raw push button and the two contacts that lead to the connector. I can’t see what’s inside under the button without destroying the housing. When I push the button, there is almost zero resistance between the two circuits. So, I’m not too sure. All I know is when I tried regular momentary switches, no go. As soon as I plugged in the factory switch, it worked. I also tested this same behavior with the tailgate release switch- regular momentary switch won’t let the BCM operate the latches.
As far as not using the factory switch, is this like a drop in bed liner? I know many have mounted the factory switch in the plastic bed liners, it just snaps right in.