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Old 12-05-2009, 04:46 PM   #1
rennalds
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Brake Pressure Warning Switch

I am just guessing, but these arent stock on 71 trucks are they if there are is it close the to the master cylinder somewhere?
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Old 12-05-2009, 07:02 PM   #2
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Re: Brake Pressure Warning Switch

They came on 71's. It is mounted on the combination valve. Often the emergency brake uses the same light & doesn't return far enough to turn it off or gets out of adjustment.
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Old 12-05-2009, 07:19 PM   #3
rennalds
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Re: Brake Pressure Warning Switch

what does the combination valve look like??
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Old 12-06-2009, 08:56 AM   #4
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Re: Brake Pressure Warning Switch

combination valve is also called proportioning valve its mounted next to master cylinder// i've never seen or heard of alight on the emergancy brakes for these trucks
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Old 12-06-2009, 09:22 AM   #5
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Re: Brake Pressure Warning Switch

moved from the electrical forum to the truck forum
Agreed, no parking brake lights in 67 - 72 trucks.
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Old 12-06-2009, 09:25 AM   #6
truckdude239
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Re: Brake Pressure Warning Switch

when ,my parking brake is on my brake waring lihgt is on? when i let it off it goes off
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Old 12-06-2009, 10:04 AM   #7
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Re: Brake Pressure Warning Switch

look for an added switch on your pedal. Never seen one stock like that, never seen reference to a stock one, never seen anything on any schematics (to include one from GM printed for techs for the new model 72 cars and trucks).
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Old 12-06-2009, 01:46 PM   #8
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Re: Brake Pressure Warning Switch

word thats what i figured i never seen it my self
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2002 Honda Accord 4 door With 330k(sisters car)
2005 toyota Avalon 228k( brothers car)
2002 Sububran 5.3 245k
2000 Tahoe 5.3l 378

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