1999 Dodge Ram brake pedal flat

1999 DODGE RAM
140,000 MILES • V8 • 2WD • AUTOMATIC
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WALTYBASSETT
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  • 1 POST
ABS & Brake dash lights lit up. pedal goes to floor. Pads are ok. When driving, brakes will stop the truck. Fluid in resivoir is full. How do I check to ensure master cylynder is operational. Approx 1 month ago, same problem, but upon driving & stopping a few times; the dash warning lights went off & the brakes worked normally(after shutting down & re-starting 30 mins later).

Is there a simple check method to decide if master cylinder is good or bad?
Mar 1, 2010 at 1:21 PM
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BILLYMAC
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yes bleed the brakes if you have good pressure at all 4 wheels cyl is good.i would scan the abs system also
Mar 1, 2010 at 7:04 PM