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Old 09-20-2009, 07:48 PM   #1
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Join Date: Aug 2003
Location: LeRoy, NY
Posts: 2,133
Car: 1987 Firebird
Engine: 3.1L V6 LH0
Transmission: Borg-Warner T-5
Axle/Gears: 3.42 open-factory

Classifieds Rating: (2)
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Brake light won't go out!

No, my tail lights don't have any problems. I'm talking about the warning light. I've narrowed the problem down to the pressure warning switch in the proportioning valve under the M/C. Yes, I've looked for leaks. I've cleaned everything under the car and stomped on the brakes several times and found nothing. I've bled and re-bled the brakes. I've disassembled and reassembled the rear drum brakes (had to adjust them after cleaning up both adjusters), and closely examined the cylinders for leaks and found none. I have a hard pedal where it's supposed to be hard, and so is my parking brake, and still the dang light won't go out. I've gone down the flow chart in the FSM and the step I'm stuck at is where I am supposed to replace the switch to see if that helps (light goes out when the switch is disconnected)... Except for the fact that I can't find the switch ANYWHERE. Do I REALLY have to replace the entire proportioning valve just for the switch?

Also, there is one more thing I can try with bleeding the brakes... I had to do this a few years ago when I accidentally bled air INTO the M/C after I replaced the front calipers and had to change the BLACK fluid that was in the system (bled a whole freaking GALLON of fluid through the whole system that time!). There is a suction cup attachment to my MityVac that I can use to bleed the valve and the M/C... I'll try doing that tomorrow, but if it doesn't work, I suppose I'm stuck... And I need that brake light OUT to pass inspection besides .
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Dan V.

Project is on hold...
The H1L-2 Raven:
1987 Pontiac Firebird, T-top
Bone Stock Except for the Following:
1991 VIN T engine, harness and ECM. Yes, I have VATS! ('730 harness is out for inspections due to problems, running on stock '302 system for now )
1984 Base Taillights
Overhead console from an 86 Berlinetta
90-92 Z/28 rear deck spoiler with HMSL delete
Eclipse CD-5435 MP3/WMA Headunit, 50Wx4 with iPC-106 iPod controller
Sony 4x6" 120W Front Speakers
Clarion 220W 3-way 6x9 Rear Speakers
Distinct (Crossfire) DVC 12" subs with Distinct 700W amp in prefab 82-92 F-body hatch box, 130+ dB (when working right)
Factory 700R4 replaced with 85 T-5 5-Speed manual trans, .76:1 OD.
Engine: 3.1L LH0 with off-the shelf air intake and a Cherry Bomb 2.25" Muffler.
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Old 09-20-2009, 09:49 PM   #2
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//<86TA>\\'s Avatar
 
Join Date: Aug 2006
Location: Central NJ
Posts: 5,444
Car: 86 Trans Am, 92 Firebird
Engine: 408 stroker, 3.1L of raw power
Transmission: Tremec TKO600, 700r4
Axle/Gears: Moser 9", 3:70 trutac, open 3:23

Classifieds Rating: (6)
Re: Brake light won't go out!

i just gutted my prop valve, its a disc disc valve,i dont know if the switches are different, but you can have it for the cost of shipping if you want it. The valve was brand new 2 years ago

Pm me

-Phil
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1986, 2000, adjust, brake, brakes, camaro, disassemble, firebird, grand, light, lights, pontiac, rear, replaced, switch, trans, wont
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