No back brakes
It sounds like your brake booster might not be working... Horrible design! Ford used the ABS pump to double as the function for the brake booster... You might want to replace the pump and the accumulator if you find that this is the problem.
on fords they have the by pass valve you can reset I was told but I don't know how but when you step on brake real hard it engages
You're talking about a proportioning valve. I agree. There's a reset button but you can also bleed the brakes on the opposite axle to correct it. Better if you don't. Just press the button or like shaggy1418 says, you can step on the brake real hard. Are you sure that the Master Cylinder works ok?
Looking for a Used Mark VII in your area?
CarGurus has 8 nationwide Mark VII listings and the tools to find you a great deal.
Search Lincoln Mark VII Questions
Lincoln Mark VII Experts