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3/19/10 2:42pm - Original Message: 'brake light comes on 80 vette'
frstvette
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Fresno, TX - USA

Vette(s):
1980 corvette

Joined: 1/15/2007
Posts: 240
my friend had a 80 vette and the brake light comes on. sometimes when the brakes are pumped the light will go off. It has new calipers, new master cylinder. The brakes have been blead but after a while the light will come on and I have to pump the brakes What do you think you think the problem could be? 

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3/19/10 3:09pm - Reply: 'brake light comes on 80 vette'
DaveM Lifetime Member
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Flanders, NJ - USA

Vette(s):
1982 Black, ZZ4, Hooker Side Pipes, 3.55 Rear, Rebuilt & upgraded 700R4, All new suspension, brakes, & new Charcoal interior.

Joined: 1/27/2004
Posts: 2530
The switch at the brake pedal could be loose or have a loose connection. Do both brake lights come on or just one? If only one then that socket may have a loose connection, if both come on, then I would check the switch.
Dave


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Lifetime Member #116
Dave's '82


   
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3/19/10 3:27pm - Reply: 'brake light comes on 80 vette'
frstvette
Former Member
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Fresno, TX - USA

Vette(s):
1980 corvette

Joined: 1/15/2007
Posts: 240

its not the rear brake light in the rear, its the light on the dash that tells you that you have a brake problem.



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3/19/10 3:33pm - Reply: 'brake light comes on 80 vette'
frstvette
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Fresno, TX - USA

Vette(s):
1980 corvette

Joined: 1/15/2007
Posts: 240
the pedel goes down and I have to pump the brakes back up. new master cylinder, new calipers, and bled the brakes, 

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3/19/10 3:56pm - Reply: 'brake light comes on 80 vette'
DaveM Lifetime Member
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Flanders, NJ - USA

Vette(s):
1982 Black, ZZ4, Hooker Side Pipes, 3.55 Rear, Rebuilt & upgraded 700R4, All new suspension, brakes, & new Charcoal interior.

Joined: 1/27/2004
Posts: 2530
You may still have air in there somewhere.
Dave


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Lifetime Member #116
Dave's '82


   
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3/19/10 10:43pm - Reply: 'brake light comes on 80 vette'
KDADDY79
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Dutchess County, NY - USA

Vette(s):
White '79 Corvette. It's a driver.

Joined: 8/27/2007
Posts: 2484

Hey Frank,

I agree with Dave. Could still be some air in the system.

When you bleed the brakes, make sure you do them in this order; RR, LR, RF and lastly LF.
Some good info I got here at C3VR.Wink


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3/20/10 12:41pm - Reply: 'brake light comes on 80 vette'
VetteSpecialties
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Mounds View, MN - USA

Vette(s):
70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe

Joined: 5/24/2007
Posts: 1031
I always have best luck using a pressure bleeder.  There was a posting here a couple of years ago showing how to make a cheap one.

Larry


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3/20/10 1:04pm - Reply: 'brake light comes on 80 vette'
aceinthehole Lifetime Member
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Valley Springs, CA - USA

Vette(s):
1978,Metalic Money Green W/Gold emblems,TH350 w/gear splitter,black & grey interior.1978,two tone,Metalic Rootbeer & gold ,Doeskin interior,auto. trans. 1981, Silver w/mirrored T-Tops,4 spd, charcoal interior.

Joined: 11/20/2005
Posts: 3618
And if all else fails, there is still the possibility of the proportioning valve.

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Jimmy B.
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3/21/10 9:09am - Reply: 'brake light comes on 80 vette'
crossfire1982
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Cramerton, NC - USA

Vette(s):
black 1982 coupe slate gray interior, 350 crossfire, 1985 fuel pump, Steeroids R&P conversion

Joined: 8/22/2006
Posts: 1094
I have bled brakes the traditional two person way and have a pressure bleeder as well but the quickest and easiest bleeding Ive done is by using "speedbleeders".  They are cheap, work well and easy to use by one person. 

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3/21/10 12:22pm - Reply: 'brake light comes on 80 vette'
rraider1
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Woodland, WA - USA

Vette(s):
1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion

Joined: 10/14/2003
Posts: 1152
If the proportioning valve was bad the light would stay on, it sets itself if their is unequal pressure between front and rear brakes, encase of a bad leak so as to only loose one set front or rear. If breaks bleed down and can be pump back up I believe it sounds more like the mastercylender you can try pumping up the breaks and on the last pump hold and if breaks bleed down it would be mastercylender


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Bob R
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