Check to make sure the bulbs are all the same brand and wattage. There were bulletins in later years advising NOT to use silver base bulbs but only brass and name brand only. Cannt speak to the indicators issue?
My 1987 Allante is giving out a false signal and I don't know why. I'm getting a message saying that my left turn signal and brake light is out. I've checked all the bulbs and everything is working correctly. One strange thing is that when I use the turn signal (right and left) it does not display the direction I'm turning nor make any sound (it use to make an annoying ding).
Round Rock, Texas
1987 Gold Allante
Sometimes you have to replace the sockets to get the computer to "see" the filament. If all else fails, that's the next step.