Brake light on in dash

[CHUCK]

1988 f350 7.3idi. I recently bought this truck. When purchased, it had rear brake problems already. The brake light would come on intermitantly, and acted as if It had no rear brakes. I recently installed new shoes, adjust correctly and hardware, blead the brakes and the RABS sevral times. The brake light in the dash still comes on intermitantly and the pedal will almost go to the floor....she'll stop, I just dont like the amount of travel...if you hit the brakes and remove foot to hit the pedal again, it pedal gets real hard....

[jesilvas]

Vacuum leak maybe. On the newer ones it's hydroboosted but older ones are vacuum boosted. By a pump I think

[CHUCK]

kindly what I was leaning toward.

[Jarrod B]

Sounds like a vac issue. check hoses and the pump itself.

[FFMUDDSPORTS]

sounds to me like the master cylinder is checking or bypassing internally.

[CHUCK]

Originally Posted by FFMUDDSPORTS

sounds to me like the master cylinder is checking or bypassing internally.

this wouldnt cause the pedal to get hard on the second pump would it?