I bought the car with a salvage title so not sure if it has anything to do with the problem but when I open the driver door or passenger door my high beams will go on. This does not happen every time I open the door, only randomly. And The only way I can get the high beams to turn off is by turning the car on and off a few times and/or opening and closing my door a few times. This didn’t start happening until recently and I’ve had the car over 5 years now. I’ve also noticed the radio will turn on/off or change station on its own when I turn the steering wheel a certain direction. Has anyone herd of these kind of problems? Or have any suggestions!? It’s highly frustrating.

 

Wow, wacky problems! 2005 sedan, right? Your factory service manuals are here:
https://www.nicoclub.com/FSM/G35/Sedan/2005_G35_Sedan/

"lt.pdf" is the lighting system. Headlight relays and a small controlling CPU are located in your IPDM. But I don't know how opening the doors might be effecting them...

Wild guess on the radio thing: could be the "spiral cable" in the steering wheel that's failing. Page 41 in "srs.pdf".