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Parking brake indicator switch

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Old Dec 18, 2009 | 10:07 PM
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Parking brake indicator switch

Can anyone tell me where to find the switch that mounts on the parking brake pedal that turns on the red "brake" warning light in the dash instrument panel? Can an aftermarket generic switch be used? Any tips on how to install? Thanks!
 
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Old Dec 18, 2009 | 11:29 PM
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No, because the is no such switch. That light is for the prop. valve in the hydo brake system.
 
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Old Dec 18, 2009 | 11:34 PM
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Mark,
Could you explain more thoroughly. What is the "prop valve?" Is the hydro brake system the big round thing that the master cylinder is attached to? Feel free to LOL at my ignorance...Thanks
 
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Old Dec 19, 2009 | 01:05 AM
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The "hydro system" is the hydraulic brake system.
The "prop valve" is the proportioning valve. This valve balances the pressure between the front (disc) brakes and the rear (drum) brakes to keep the rears from locking up, disc brakes require more pressure to operate than drums.
It also has a switch built into it to activate the brake failure light on the dash if either the front or rear systems lose pressure. This is the light you're talking about.
That "big round thing" is your vacuum brake booster, you have power brakes.
 
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Old Dec 19, 2009 | 06:13 AM
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click here, then scroll to the bottom of the page:

LMC Truck Parts - Page 125
 
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Old Dec 19, 2009 | 11:53 AM
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When you first turn the Ign key to on and then start both the BRAKE FAILURE LIGHT and seat belt light illuminate for a few seconds then go out.

It is a bad thing to have the BRAKES Light stay on.
 
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Old Dec 19, 2009 | 12:57 PM
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So what's the relationship between the dash light and the parking break? I've always thought that the dash light just informed me that my parking break was still on. How does the parking break trigger the switch? Thanks!
 
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Old Dec 19, 2009 | 03:52 PM
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The parking brake is not associated with the switch.
 
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Old Dec 19, 2009 | 04:00 PM
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So, what you're saying is that I'm all wet. The dash light is not a parking break indicator, rather it is a brake system failure warning light and has nothing whatsoever to do with the parking break. Correct? Thus, the parking break is completely manual with no electrical connections at all. Hmmmmmm...
 
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Old Dec 19, 2009 | 04:08 PM
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Nope not a parking light indicator. If the brake light is on the proportioning valve is not centered. Check to see if both the front and back brakes are working. Something may be grounded out making the light come on if you find that your brake system is working properly.
 
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Old Dec 19, 2009 | 04:24 PM
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only newer cars have the indicator light for parking brakes. Our old faithful vehicles weren't that sophisticated
 
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