1970 Mustang
 

Brake Booster vacuum is sucking brake fluid into the intake. Does anyone know if this is a bad master cylinder?
Alternator light stays on, alternator is charging.

Re: 1970 Mustang
 

yea you have a bad master if it is pulling brake fluid in your booster, really dont know bout the alt. problem could be your voltage regulator..

Re: 1970 Mustang
 

I dont have a booster, but i thought that the MC was the same, which would mean that it couldnt get fluid through it??? Unless its leaking through the back of the MC i guess. http://auto.howstuffworks.com/power-brake1.htm Shows how they work. I had the same problem with my GEN light, check your voltage regulator. Check out my old thread on that! http://forums.mustangworks.com/showthread.php?t=48538