Bumping this thread as I am hoping that someone that has done this can give me a little help with this for my 1995.5 Tacoma.
I got a map light mirror unit with the center switch for door lights from a 99 4Runner (looks just like the one in post #1) and I want to have it so that both the original overhead dome light and the new up front lights work all at once with door trigger for better cab lighting and got it installed. Figured the wiring would be no problem taping into the Tacoma dome light which has on/off/door switch. Tied into the dome light Black (power) & Blck/Wht (door trigger) to the appropriate leads on the new map light unit but having a couple issues:
1) new map lights work great unless the Tacoma dome light is on then they are extremely dim (barely lit).
2) new lights don't work at all when door opens regardless of switch setting (truck dome light still working properly)
I've tried playing with the wiring and am fairly confident I have tied into the wiring correctly but have the following concerns.
a) maybe the new unit is broken -- the map lights work with their switches but not at all with door trigger. How do I test the door trigger lighting feature?
b) It's possible that I have something wired incorrectly, but I have checked and rechecked. There are only two wires for crying out loud!
c) Maybe my wire splicing is poor (I used the standard blue splice clips so would think it is okay). Guess I can redo the whole thing. which may require redoing the factory lead to the original dome as it was barely long enough to get to the original dome and a pain to work with.
Shouldn't there be enough juice on the line to power all three lights when turned on yes (original dome and two front map lights)? Thus the dimming front lights when the original dome light is turned on is a concern and likely a clue here.
Enough babbling...any thoughts/suggestions would be appreciated.