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08-16-2007, 10:59 PM
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#1 |
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Registered User
Join Date: Apr 2004
Location: Clanton, AL
Posts: 1,253
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HELP! Brake light on! Pedal hard, tried everything.
Ok, so I recently put 6 lug disc brakes up front & I'm to the point where I want my drums back. Earlier I had a bad reman master cylinder, that problem is resolved. 71 style MC & used prop valve.
Now my Brake light comes on after I stop quick. The first time or 2, it goes off, then stays on. The pedal gets hard when the light comes on. Doing about 25mph downhill, I am unable to lockup any wheel. I've bled the brakes more than once. Question1 - What gives? What am I doing wrong? Bad prop valve? (its the only thing not new). Question2 - What does the brake light sensor signify? What exactly is it measuring? I'm at my wit's end. Thanks for your response. John
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85' CUCV M1009!!! The newest addition! 6.2diesel, Th400, NP208, & only 36k miles! 70' C-10 LWB Fleetside - Looking good these days!  05' Dodge Neon 88' Winner Escape Sport 1750 - 4.3v6 94' Seadoo SP 84' Honda TRX200, bare nekkid. Just a frame & tires. Always looking for another project or any good deal! 
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08-16-2007, 11:14 PM
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#2 |
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Registered User
Join Date: Apr 2000
Location: Bonne Terre, Mo
Posts: 3,005
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Re: HELP! Brake light on! Pedal hard, tried everything.
Air... It will work it's way out eventially bleed it again. I think the brake light is telling you the valve is not centered to one side of the M/C. Did you bench bleed the new M/C using the small plastic tubes?
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'69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629" |
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08-16-2007, 11:34 PM
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#3 | |
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Registered User
Join Date: Apr 2004
Location: Clanton, AL
Posts: 1,253
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Re: HELP! Brake light on! Pedal hard, tried everything.
Quote:
I know someone had mentioned in a diff thread to clamp the little button in the front of the prop valve when bleeding. The pin is already in. I can pull it out, but it seems spring loaded & restes "in" towards the main body of the prop valve.
__________________
85' CUCV M1009!!! The newest addition! 6.2diesel, Th400, NP208, & only 36k miles! 70' C-10 LWB Fleetside - Looking good these days! 05' Dodge Neon 88' Winner Escape Sport 1750 - 4.3v6 94' Seadoo SP 84' Honda TRX200, bare nekkid. Just a frame & tires. Always looking for another project or any good deal!
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08-16-2007, 11:37 PM
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#4 |
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67-72 Addict!
Join Date: Feb 2002
Location: The TAX State!
Posts: 7,857
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Re: HELP! Brake light on! Pedal hard, tried everything.
I'll be watching this thread closely. I'm having the same hard peddle issue with my disc conversion. I'm pretty sure it's just air still in my lines.
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Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads |
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08-16-2007, 11:45 PM
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#5 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: HELP! Brake light on! Pedal hard, tried everything.
This should help:
http://www.classicperform.com/TechBo...t.htm#testprop
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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