I haven't heard of a stopped up brake line but I think a proportioning valve would give you the same symptoms. If it is the proportioning valve then you should only have one axel working because the valve picked up a leak or ?? and shut down fluid to that axel
It is located behind the plastic splash shield in the left front wheel house. If you are looking at the left front wheel the proportioning valve is located at approximately the 2:00 o'clock position of the wheel behind the splash shield.
on the back side of motor by firewall
Horn valve? Please give more info.
Yes.
The master cylinder may be at fault (internal seals bad). The proportioning valve may be at fault (frozen). The system may not be bled properly (air in system). The rear wheel brake cylinders may be at fault (frozen).
Assuming V8 gasoline engine, it should be bolted onto the intake manifold.
You might want to examin your proportioning valve
Check your EGR valve Check EGR valve
That would be a 4L60E
The brake proportioning valve on a 1993 Lincoln Mark VIII is typically located on the driver's side of the vehicle, near the rear axle, mounted to the frame or the body. It is connected to the brake lines and helps to distribute braking force between the front and rear brakes. To access it, you may need to lift the vehicle and remove any underbody shields or components obstructing the view. Always consult a repair manual for precise location details and guidance.
That would be the 4L60E transmission.