Weird movie on Up All Night or MonsterVision?

This has been plaguing me for many years. I still have not found the answer to the name of this movie.


Here's it goes a long shot and what I can remember..............

I believe this movie was late 80's to 90's.
It was about a teen girl with some sort of plug thing in her neck.
Her boyfriend was in a wheelchair.
She and her little brother are being hunted by some sort of robotic company. What the plug thingy can do or stop. Turns out her father was also hunted, and killed
I think it was when you hit 18 then it gets activated.
I think she plugged it into something and found out what the answer to whatever needed to be done. Could have been how to stop the evil company?
The robot hunter turns out to be her boyfriend. He wanted to walk asked the company for help. They used him in the suit to hunt the girl.
It ends with him being there about to kill her and her little brother. He pulls off the helmet saying he can't kill her, and dies. The suit had a kill or be killed switch in it. It was like a rundown timer.