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1979 Mark Brake Booster / Switch Issues

Hello Bill -

I have 1979 Lincoln Mark V. I replaced the power brake booster and my brakes pads don't release from the disc. Also when I replaced the power brake booster I replaced the brake light switch as well and now when the car is running, the brake lights stay on, and when I turn off the car, the brake lights stay on - what would be the problem ?

Ivan

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Ivan -

Were these items purchased from Lincoln Land? I want to make sure you received the correct parts.

Bill
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Bill -

No they weren't.

Ivan

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Hello Ivan -

If these two issues appeared ONLY AFTER the booster and the brake light switch were replaced, I can only suggest the following without actually seeing the installation......

The booster and its linkage, or the brake switch could somehow have been installed incorrectly in a way that holds the master cylinder piston partly applied and also the brake switch activated.

The other possibility is that the booster is incorrect or internally faulty. As you have not purchased these parts from Lincoln Land - you need to contact your supplier. Had they been purchased from us - we could advise you further, as we stand behind what we sell. If you are satisfied that the installation is indeed correct, this will be your only recourse. Of course DO NOT drive the vehicle in this condition!

Sincerely,

Bill