I recently replaced a faulty rear interior dome light fixture with an aftermarket replacement from DMC. I reinstalled the LED bulb I had for it with the new fixture and it works. It will only come on when you tilt the lamp one direction and not the other though (same thing with the front light fixture).
The wiring diagram for the interior/door lights shows the always on wire coming from fuse #12 and this is the power source which allows me to turn on the interior light manually. They do not come on though with the doors being open as shown going through the "delay unit" or relay #25. I don't have a relay #25 in place as it was pulled sometime ago. I don't remember why really, other than it was related to not having the dimming feature if you go with LEDs in the dash. I do have a dimming feature through the rheostat for my instrument cluster bulbs (never changed to LEDs) and my HVAC panel bulbs might have been changed to LEDs, I don't really remember at the moment.
Can someone explain how that delay unit/relay was intended to work with the dome lights or dash lights and what my options are to make it work again, with or without LEDs? I imagine I have the correct relay to put back into that #25 spot in a box somewhere if needed. As for now, the dome lights have LEDs in them and so do the six door lights. I think that is it though.