jo14

I have a '79 F-150 and the brakes worked awesome, it could stop on a dime. It was sitting for a week, and when I went to start it to move it and had no brakes what so ever. Checked the master cylinder and it was dry. So I pressure washed the under body and topped of the brake fluid to look for a leak, but can't find one. The only thing I can think of is the master cylinder is shot, but the doesn't explain why I can't find the leak. I don't want to replace the whole brake system and find out it was something simply. Any ideas??

Bert

If it has power brakes, the fluid probably leaked into the booster. You'd need a new master cylinder then.

Bert

After you pressure washed it, did you let it dry before checking for a leak? And was it the rear reservoir that was low?

jo14

I was thinking that is was leaking into the booster, I just wasn't sure. And yes I let it dry over night. Thanks for the help