Emerson model MT9000 in dash radio- monitor- Need wiring diagram
I recently removed the Emerson model MT9000 in dash radio- monitor because the display was failing. I believe this radio was original to the coach. I am going to install a Clarion NZ503 in its place. Unfortunately I do not have the wiring diagram of the Emerson. I have not disturbed any of the plugs that were connected to the Emerson. Although most of the wiring is self explanatory, I do not know which wire (if any) was the parking brake wire that will allow the new radio display to work. Does anyone have a wiring diagram for an Emerson model MT9000, or know which wire is the parking brake wire?
I have searched the web for a manual with no success.
I would prefer to hook the parking brake directly and avoid using the toggle switch or relay method.
Thanks to all in advance