Brake Pedal Very Hard On '91 Sc...help!

PACKIN86

Registered User
The brake pedal is VERY stiff (like you unhooked the vaccum line to the booster). What could this be? I have heard it may be the ABS pump?!?! thanks
 
One of 3 things (assuming the fuses for the system are good.)

1) ABS Motor Relay Bad (brown based relay on the passenger side firewall.)

2) ABS Pressure Switch (located on the driver's side underside of ABS Unit.)

3) Bad ABS Motor

Items listed in order of likelyhood.

I assume also you have the Red Brake and yellow Anti-Lock lights lite?
 
Do the system self test....turn Ignition ON but do not start the car. Observe the Anti Lock and Brake lights and report back. Also apply your parking brake after the test if the red brake light never lights and make sure it works.
 
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