I have a 1990 740gl and I am having some electrical problems. It seems that everthing on the passenger side of the car doesn't work. For example :

passenger side seat heater doesn't work (drivers side works fine)
passenger side power window doesn't work (all others do fine)
passenger side speakers will sometimes go in and out
dome light doesn't turn on when the doors open
passenger side turn signal doesn't work (the light works, just not when I use turn signal. I replaced all parts for that turn signal assembly)
sometimes the lights behind the console stuff goes in and out, and also the car clock near speed guage.

Hopefully there is one thing that is the problem. What do you guys think?

 

Check the bundle of wires that goes to the passenger side door, right where they flex/bend. Sounds like some are broken and/or shorted.

 

I agree.

 

so do those wires contain the wires for just the speakers, window and dome light of my list of my problems? I will definatly check it out.

 

There should be one big bundle leading into the door, and somewhere between the door and the engine bay there could be a stripped or cracked wire touching metal, or something like that. Take a look, and let us know what you find.