Car Information:
Year: 1987
Engine Size: 302
Trans: Automatic

Issue / Question:
After driving for approx 30 minutes the dashboard light for the brake’s anti-lock system and brake’s red and yellow lights both came on.
They will not go away until the ignition is turned off and then on again. I have heard it is the proportional valve or the booster / mastercylinder. Once I press the brakes the light will come back on.

It’s most likely a hydraulic pressure loss. If you don’t clearly see a leak it may be the master cylinder. You can also pull it off the booster and see if its leaking at the rear of the cylinder.

For professional auto repair & services in Orlando you can call our shop today at 407-629-2661.
Magic Mechanic
1432 Lee Road OrlandoFL32804 USA 
 • (407) 298-7447