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04-30-2010, 04:47 PM
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#1 |
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Registered User
Join Date: Mar 2010
Location: Casper, Wyoming
Posts: 147
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parking brake light
so recently my parking brake light has come on and decided to stay on. if i push my normal brake pedal down at about 3/4 of the travel the light will shut off and just a little past that come back on. thinking it was the parking brake switch i unplugged it, the light went away at first, but now its back on and there isnt any way the wire for the switch is grounding on anything, i taped the end.
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04-30-2010, 05:00 PM
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#2 |
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Insert Witty Text Here
Join Date: Oct 2002
Location: San Antonio, TX
Posts: 3,415
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Re: parking brake light
Maybe it is telling you that there is a problem with your brakes, proportioning valve, or master cylinder? I'm not sure, but I think the "brake" light is used for more than just the parking brake.
Slonaker |
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04-30-2010, 06:57 PM
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#3 |
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Robert Olson Transport
 
Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,281
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Re: parking brake light
how is the fluid? does the brake pedal feel ok? does the truck pull when you step on the pedal?
__________________
Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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04-30-2010, 09:49 PM
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#4 |
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Registered User
Join Date: Mar 2010
Location: Casper, Wyoming
Posts: 147
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Re: parking brake light
fluid is ok. brake pedal has some free play, and it seems like i loose my power brakes alot. the right side rotor is kinda glazed so it pulls to the right under a hard stop.
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04-30-2010, 11:33 PM
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#5 |
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78 Big10 454
 
Join Date: Jul 2008
Location: Pismo Beach, CA
Posts: 838
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Re: parking brake light
The light is telling you that there's a problem that needs to be fixed. On my '78, everytime the light has gone on, it has been due to a faulty master cylinder.
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05-01-2010, 01:57 AM
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#6 |
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In the Forgotten far North.
Join Date: Jul 2007
Location: Anchorage, Alaska
Posts: 2,627
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Re: parking brake light
Look at your prop-valve, You'll see another electrical connector there as well. That's your brake pressure sensor switch. If you've got little to no brake pressure, it'll cause your brake light to come on. I have seen very few prop valves fail, but have seen alot of M/C's go belly up. as well as power brake boosters.
My moneys on the Master Cylinder. Replace it as well as your front brake pads & rotors (maybe resurface them if possible) and also replace your front caliper hardware. Be sure to lube up the caliper guides/slides well to help keep them from hanging up on you. I'm betting that's what was causing your truck to pull to that side initially.
__________________
1987 R3500 CREW CAB DUALLY (BIG RED)Acquired 06/12/2015 1990 chevy suburban V2500 5.7L My cluster Mods-Nov 2007 overhead console Stereo install Round 2 Aug 2009 Heated/turn signal mirror upgrade |
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05-01-2010, 02:00 AM
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#7 |
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Registered User
Join Date: Oct 2009
Location: Buhl, Idaho
Posts: 1,438
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Re: parking brake light
I also had this problem, i checked the fluid and the back resevior was dry
 somethings wrong with your brakes.
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86 c30 crew cab dually 454/400 4/6 drop SOLD 1-8-11 1981 chevy K10 short Bed Scottsdale SOLD 10-26-2020 67 GMC Stepside Straight six/3 on the tree "The Peach" 2020 Silverado Double Cab LT Z71 5.3 8 speed Daily Driver K10 build http://67-72chevytrucks.com/vboard/s...d.php?t=671934 The Peach build http://67-72chevytrucks.com/vboard/s...d.php?t=733903 
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05-01-2010, 12:07 PM
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#8 |
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Registered User
Join Date: Nov 2008
Location: Lusby, MD
Posts: 563
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Re: parking brake light
i would check the rear cause the cylinders go bad and start leaking
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