Brake light on in dash - Ford Powerstroke Diesel Forum
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post #1 of 6 Old 12-15-2010, 05:02 PM Thread Starter
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Brake light on in dash

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....

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post #2 of 6 Old 12-15-2010, 05:24 PM
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Vacuum leak maybe. On the newer ones it's hydroboosted but older ones are vacuum boosted. By a pump I think



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
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post #3 of 6 Old 12-15-2010, 07:16 PM Thread Starter
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kindly what I was leaning toward.

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post #4 of 6 Old 12-15-2010, 07:18 PM
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Sounds like a vac issue. check hoses and the pump itself.

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post #5 of 6 Old 12-15-2010, 07:18 PM
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sounds to me like the master cylinder is checking or bypassing internally.
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post #6 of 6 Old 12-15-2010, 07:22 PM Thread Starter
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Quote:
Originally Posted by FFMUDDSPORTS View Post
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?

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