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Parking Brake light on all the time....fluid in Master Reservoir is full


4dr_vr4
Junior Member


Galant VR-4 org Post #: 1240470 posted 11/12/17 07:26 PM     Remind Me!  Send Private Message   Edit Post      
The Parking Brake light has decided to come on and stay on for reasons unknown. Brake lights go on and off. Brakes work fine and master is full.

Any ideas?

Thanks.

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Nebraska
Junior Member
1099/2000


Galant VR-4 org Post #: 1240475 posted 11/13/17 03:28 AM     Remind Me!  Send Private Message   Edit Post      
Maybe your parking brake switch took a shit. Iíd have to check schematics but I believe that it is a normally open switch and when you pull the ebrake, the plunger releases as well and the contacts close. Iíd imagine if itís not broke, itís stuck and can be physically corrected but when in doubt ohm it out.



1099/2000 Summit white
"Do it once, Do it right."

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thomcasey
I ain't no puny human
1025/2000


Galant VR-4 org Post #: 1240476 posted 11/13/17 06:09 AM     Remind Me!  Send Private Message   Edit Post      
There should also be a brake fluid level sensor connection at the master cylinder. I think it is either a 1-wire or two wire connection.



Thom
1991 GVR-4 1025/2000 (PTE 1200's, 16g, DSMLink v3, gm-maf, eagle/ross, .020 over, 272's)

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Nebraska
Junior Member
1099/2000


Galant VR-4 org Post #: 1240489 posted 11/13/17 10:11 PM     Remind Me!  Send Private Message   Edit Post      



Here is the service manual schematic. I do not have my reservoir plugged in and my light does not come on. I guess you can use that as a troubleshooting tool though.
Good luck

-Garrett



1099/2000 Summit white
"Do it once, Do it right."

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AllanL
Heal and Toe


Galant VR-4 org Post #: 1240500 posted 11/15/17 07:19 AM     Remind Me!  Send Private Message   Edit Post      
Check the rubber gasket under the cap of the fluid reservoir.

Shape should be like this:



If not, will make the dash brake light stay on always...just massage it to bring it back to this shape.


Edited by AllanL (11/15/17 07:22 AM)

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Nebraska
Junior Member
1099/2000


Galant VR-4 org Post #: 1240506 posted 11/15/17 10:28 PM     Remind Me!  Send Private Message   Edit Post      
How would the diaphragm make the light come on?
Not saying youíre wrong by any means.



1099/2000 Summit white
"Do it once, Do it right."

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fuel
"Just to be pedantic!"


Galant VR-4 org Post #: 1240518 posted 11/17/17 11:25 AM     Remind Me!  Send Private Message   Edit Post      
the diaphragm can poke out and push down the level sensor.



'91 E39A Galant VR-4 Evolution | '80 A164A Eterna GSR Turbo

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FlyingEagle
Doesn't Match Anything


Galant VR-4 org Post #: 1240530 posted 11/18/17 03:48 PM     Remind Me!  Send Private Message   Edit Post   
Ah, I was going to say that the Park brake light comes on when the alternator brushes/voltage is dipping because things are on the way out.



C53A 1 of the ~1500

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