Medallion MMDC and air pressure switch

[63Hotrod]

On an 08 Endeavor I am looking for the location of the MMDC ,what and a part number

i think this might be the cause of our low air pressure 

ok

Does anyone know what the low pressure switch on the tank triggers. Wondering if this is what triggers the info center to display low air pressure  Going to unhook the Medallion pressure sensor to see what this does soon as it warms up

[RustyTools]

Did it warm up yet?  What was the results of your test?