So, like many of you, I'm learning a lot on the fly. In trouble shooting my transmission modulator issue, I learned about electrical relays. I examined how my buses relays work and about normally open and normally closed switches, active and inactive coils, etc..
The relays I've been working with have the coil continuously activated (12v) which opens the switch circuit (turns it off). When the coil is de-activated (0v) the switch circuit closes (turns on) and the accessory (the modulator in this case) receives 12v and does its thing.
Well, in planning a work around for my modulator issue, I wanted to try and use as much as the existing circuitry as possible. But, I didn't want the coil activated, as it is now. So, I went searching for a Normally Open coil and Normally open switch set-up. I could not find it....and then, I stumbled across this document.
This is where I'm hoping to get some guidance.
It appears that the relay itself doesn't determine Normally open or closed, but it's how you wire the socket.