Door post switch????????

[walkercreekbronco]

On the driver's side door post (1973) there is a plate with 2 screws on it. I pulled the screws out and there are two wires going to this plate. What is this?

 

[Bronco Bull]

Where on the drivers side door?

 

[STLKIKN]

If this plate is in the upper part of the door post I think I know what it is...
I have seen this once before.

It is a temperature sensor for your engines emissions system.
Ford experimented with a temperature sensitive ignition system in 72/73.
If your engine / emissions/ distributor are still stock you will find there are a few items that are different in comparison to a "normal" Bronco.

Very few of these trucks were built, even fewer made it to the open consumer market...