Brake light on - Pontiac GTO Forum
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post #1 of 2 (permalink) Old 02-15-2016, 08:09 AM Thread Starter
 
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Brake light on

I replaced the master cylinder and it works great but the brake light is on. Put low level switch back on and connected the wire. The switch is naturally open so I believe if it was broken or disconnected the light would not be on. Do I have to reset something?
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post #2 of 2 (permalink) Old 02-15-2016, 06:25 PM
 
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You probably got that brake pro portioning valve out of center....when it is working right and centered you don't get a brake warning light. When the pressure is uneven like from a leak......then it shorts to ground....

So you have to really make sure. You have no leaks at the fittings first and then a good bleed.....of course you bench bled the MC before you installed it...

No leaks and a good bleed...and the valve should be centered....try that first
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  Pontiac GTO Forum > The 2004-2006 GTO > Drive train, suspension, alignment and brakes.

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