Electrical problem on '88 735i

[viper2m]

okay! here's my story. when I first bought my car about 7yrs ago from my cousin, car already came w/ intermitent tail light problem. when I drive it at night ,after awhile I get the annoying sounds and, a message about my tail lights being out. then, it will turn back on again later. weird... anyways, I drove it like that for a while. till about two years ago took it to European shop and got diagnose. the shop told me that I have a bad computer board and need to be replaced. so, they replace it but, the problem never went away. went back a few times but, everytime car in the shop it never does the problem. finally I got fed up w/ it and never went back. then, about a week ago my right low beam went out. thinking just a light bulb. but after replacing the bulb still no light. I ask my uncle if he could take alook why is not working. after he checked it w/ a tester ( looks like a screw driver w/ pointy tip & LED ) he told me there's no power on the cable that plugs to low beam bulb. I don't know how that happen but, he did ( temp fix so, I won't get pull over ) a micky mouse job where he attach to parking lights to get positive line. now the freaking right headlights comes on when ever parking lights is switch to on. or, everytime I set the car alarm. sometimes I wonder if it's better to just sell the car cuz, this year everything starting to fall apart on this car. put new trany, H2O pump, fan clutch, shocks, and the two front end arms. I think thats what it's called cuz, stearing wheels was shacking alot. anyhow, last night my left headlight wasn't working. and all the messages are going haywire on the dashboard. also, I forget to mention the digits# below odometer has broken numbers too. been like that the day I got my car. then, out of frustration lastnight I kept pressing the plastic cover for Tach & Speedometer and, realized everytime I push the cover on the bottom, those broken digits comes back on. anyone ever had this problem? or, think it's a short somewhere on my dashboard. for sure today as soon I get home from work I'll remove the cable that my Uncle attach to parking lights. and, hopefully the left headlight comes back on. are BMW 7 series known for electrical problem. anyone else had a tail light problem? what did you do to fixed it? is there even a fix for this type of problem besides, re-wiring the whole car. I think the car is possess or, maybe Cristine is back and use my car as a disguise.
sorry for such a long post. I'm actually debating w/ myself if I should post it or not. but, then again I really need you guys help and advised so, I post it.

To everyone, thank you in advanced.
viper2m