You have to remove the Master Cylinder, disconnect the rod that is connected to the brake pedal and remove the bolts holding the Power Booster on. Connect in reverse order.
you need a new brake booster
Not true, they have power brakes.
Under the hood. Drivers' side attached to the brake booster on the firewall
Remove the hydroboost unit from the firewall and replace it with the vacuum assisted booster. If you are careful you may be able to do this without disconnecting the brake lines. You will need new powersteering lines and find a vacuum source for the new booster.
The power brake booster is probably at fault.
Purchase front brake pads for a Lincoln Mark VII with ABS. Purchase DOT 3 brake fluid for a Lincoln Mark VII with ABS. Purchase a disc brake piston tool. Park the vehicle. Disconnect the battery. Raise and support the front of the vehicle. Remove the wheels. Remove 1/2 of the brake fluid from the reservoir and disguard. Remove the caliper pins. Raise and support the caliper. Remove the outer brake pad. Return the inner brake pad and piston into the caliper with a disc brake piston tool. Remove the inner pad. Install new brake pads. Fill brake fluid to correct level. Reassemble. www.TheLincolnMarkVIIClub.org NOTE: Be sure to use metallic pads - you won't get the brake dust mess on your rims.
turn it counter clock wise
The brake booster is in the standard location, but it doesn't look anything like a traditional booster/master cylinder. It's a long two or three piece aluminum unit called the actuater in the shop manual. The plastic brake fluid tank is bolted to the top side of the unit. They're also obsolete and getting very expensive to replace. The manual claims there are no serviceable parts inside! most failures of power brake booster is the booster relay 23.00 dollars from dealer located near booster on firewall
the anti-lock booster is bad. you will still have brakes but they will feel like manual brakes. the brake system as well as the air bag suspention systems are only designed to last about seven years. you can buy the repalcement booster at any auto parts store however be prepared to spend some money.
Front or rear?
Could be a partly frozen caliber.