wierd electrical symptoms? any idea?

[n1n3b0y]

well, i've had my x for almost a year now and i've done the regular stuff that seems to need replacing given my mileage and year like the differentials, both window regulators, etc, etc, etc.... its 2001 4.4 with about 95k on it.

anyways im getting my abs light, dsc, airbag, seatbelt on my dash once and a while. sometimes some of them, sometimes all of them, sometimes it will go on when i start my car.. sometimes all of the lights are gone and everything is perfect. sometimes while im driving and those lights are on my car dings at me and gives me the trans safe fail symbol. still drives perfectly, shifting fine. i find that sometimes my brake light above my trunk is on at all times and even gives me a 'check brake light' warning only when these lights on my dash come on. also my nav screen doesnt work when these lights are on. the screen would come on but none of my buttons work, no radio as well. but sometimes when i start the car its just fine.

it seems like when these lights arent on, on my dash, none of these symptoms happen and it drives like a brand new car. but sometimes when i start my car, these lights come on and the radio doesnt work, my brake light is on, abs symbol comes on..

is it wierd that i noticed it happens mostly when i have passengers in my car? or is that just a coincidence..? i tried unpluggin the battery and resetting the car, but still nothing. actually it made something worse, it seems to have lost its updates on the screen cuz now the interface looks really old school. and i dont have the same color schemes as i used to.

sorry for the long post, but if anyone else can help, it would be awesome. btw, i took it to my indy shop that specializes in german cars and does all the work for me flawlessly in the past, but they dont know whats happening. they replaced some brake sensor switch thingie but that didnt work. actually i think it might have caused my brake light to always be turned on cuz i never noticed that before the operation. they said i may have to replace some part in my radio that costs around 1600$ but they dont even know if that will fix it..

anyways, nice to meet you guys, i've been lingering around the boards for a long time but only recently started posting. take care..