o.k. I'M STUMPED CHOKE LIGHT ISSUE

[impalamark]

I could use some help
my 82 is giving me fits in this cold weather ,ok but for florida the 40's is cold
choke light stays on
12 volts at choke terminal on carb
truck runs like crud when cold
truck idles really high all the time even when warm
oil pressure on gauge says 35lbs at idle
oil level is good
As i understand it the choke circuit runs through the oil pressure switch
so it only works when engine is running and low oil level or pressure can
cause open circuit, choke light to come on and no voltage to choke
power lead BUT I have a choke light on and voltage at the choke terminal

I realize I just have something backwards in my head or am missing something obvious but this is my daily driver and I'm out of ideas
any hep would be welcome
MArk