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"b" light stays on and it won't turn off
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Vw4x4
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Joined: May 18, 2004
Posts: 211
Location: SUNNY CALIFORNIA
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PostPosted: Mon Aug 30, 2004 6:42 pm    Post subject: "b" light stays on and it won't turn off Reply with quote

I assume that "b" light is for parking brake, who does it work, where is the switch located at or may be it is connected to master cylinder. Can I change my brake switch light without bleeding the master????
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emersonbiggins
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Joined: February 18, 2003
Posts: 1638
Location: Nebraska
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PostPosted: Mon Aug 30, 2004 11:21 pm    Post subject: Reply with quote

You should try and bleed the system at each of the wheels. If the light still comes on, could be a problem with the master cylinder.
You can replace the senders on a master cylinder and then rebleed the system at each wheel.
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mattt
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Joined: January 20, 2004
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PostPosted: Mon Aug 30, 2004 11:30 pm    Post subject: Reply with quote

"B" light has nothing to do with parking brake. There is no parking brake light. That light signifies a problem with the brake system. It most commonly comes on when there is a pressure differential between front and rear portion of MC. Thats why there are two switches on the MC.

I dont think you can change the MC switches w/o bleeding the system afterward.

Have you noticed any change in braking ability? My guess is yes.
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Old and Grey
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Joined: April 21, 2004
Posts: 33
Location: Winnemucca, Nv
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PostPosted: Tue Aug 31, 2004 7:37 am    Post subject: Reply with quote

I have the same thing...only mine started when i installed an alternator,
and used the gen. idiot lite wire to turn on the alt. as the wiring diagrams
show. any suggestions?? Both lights are powered off the same fuse,without a blocking diode it's letting the B lite ground through the alt.feed.
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