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Brake Boost P258B

Caymanedge

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Jumped in the rig yesterday, brake pedal hard and grinding and barely stopping….
Pulled code P258B Electric Vacuum Pump.
Checked Fuse 35 and it was good. Disconnected all brake related electrical connections and reconnected, nothing.
Should I breakdown and spend $200 on a Vacuum Pump?
Thanks
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Caymanedge

Caymanedge

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Swapped out the Brake Booster CHeck Valve...nothing
 

mwilk012

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No, you shouldn’t ever just change parts without testing.
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