does anyone know were to plug a code reader in to a 1992 ford bronco?

 

Driver side inner fender between the hood hinge and the firewall.

A photo from Subford:

 

It's a OBDI connection.
It's on the drivers side inner fender
You plug your reader in from the underside, or you have to disconnect the connection from where it's held by a plastic connector.
You tube has a video, search "Ford OBDI"