I have a 89 DX and I tried to put a window reg from an 89 HF and it would not work. Is it because I have the seat bealts that are in the door and the HF dosent. Let me know .Thanks Oh yeah on the the HF reg it has H2L on it and mine from the DX has 2L. I know the L is for left but what do the other nukber and letter stand for?