Some Electrical Help Please...

i think you have the red switch and you need the grey switch

easy to say when i'm chugging coffee and bored at work but looking at the helpful picture looks like you dome light is being treated as side/parking which is only availble on red switch

"To dome light 79 an earlier" on the grey switch has a jumper/link to a stud in the switch to the north east which the red one does not

that dome light pin on the grey is the park lights on the red

park lights may well stay on when headlights are on hence dome light is on all the time

there seem to be a number of A body like switches

simple poverty spec switch 6 pins
7 pin switch
and austrlian version with 6 which seems to be a clone of the US one made locally
and a Mopar version they used in jeeps until the 90s

all have the annoying heat based circuit breaker. that will suddenly leave you blind on a moonless night on an unlight road
once it has pinged off once it gets into the habit

First thing i'd do is get a new switch...got mine off Rick Erhenberg.. Good service and the switch was RIGHT

Dave