Here we go:
With both doors closed, I read 12v to the green/ yellow connector on the roof and 0V at the black/blue connector. With the driver door closed and the passenger door open, I read the opposite - 12v at the black/blue connector on the roof and 0V at the green/yellow connector.
With both doors closed and pressing the passenger switch, the passenger light and center light come on. Turning that off and pressing the driver switch turns on the driver light and center light. Pressing both switches only turns on the center light.
With the driver door open and the passenger door open, neither switch turns on a light.
Hope this helps.
Update with more info:
With both doors closed, and with the dome light switches turned off, rolling the panel dim switch to "on" does nothing. It doesn't light up the center light. Turning on either the left or right side dome light switch, and then turning the panel dim roller to the "on" position turns the lights off. The panel switch still turns on the hatch light like normal. With both dome light switches on, turning the panel dim switch to "on" turns off the center light.
'92 5.0 LX
h/c/i and other goodies
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