I have a 91 240sx and the stock drivers seat bolster was all torn up. I found a replacement set of the same seats and when I took the old one out (unplugging the harness underneath), the headlights came up for some reason. I put the new drivers seat in, plugged up the harness but the headlights were still up. The seatbelt sign on the dash was flashing also.

I thought maybe the harness on the new seat was messed up so I tried putting the old seat back in but still the same thing. The car was off during the whole time including the headlights.

Can someone help me out and tell me what the hell is wrong with my car?

 

check out the head light pop up button you may have hit it while putting the seat in...also the blinking seat belt thing will go out after youve driven the car for like 2 mins...as long as your seat belt is on dont worry about the light

 

Yeah I'm a moron. I figured it out a couple of days ago and it turned out to be the headlight pop-up button.
I just picked up the 240 last week and it being my first car with pop-up headlights, I had no idea there would be a separate button for them besides the actual headlight switch.