So last night my pedal went soft, now this morning my abs and brake light r on, pedal is REALLY soft, have fluid, no leaks. Any ideas? When I push it to the floor o can hear it squeak too...and I'm lost...

 

It could be a failure of the master cylinder. Fluid is basically leaking internally so you're not developing pressure.

 

Would that be on the brake booster?

 

Nevermind...brain fart I was thinking something else, master is where u put the fluid

 

Is there any way to troubleshoot?

 

Try this, step hard on the brake. Does it grab then start bleeding down?

There aren't any good clues, it's mostly exclude the rest of the stuff.

If you don't see any visible leaks then the only likely place is at the master cylinder. Since it is not low on fluid it isn't likely leaking out the back of the master cylinder either so it probably is internal.

 

Yeah sometimes at first it's stiff then goes soft, and it will also just go straight to the floor but yeah u can feel the play in it...

 

It looks like you'll need to replace the master cylinder then.

 

Well find out this weekend...bleed them too huh?

 

Yup, you'll definitely need to bleed the entire system.

Make sure you bench bleed the master cylinder before you install it or it'll take you forever to get the air out of the lines.