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-   -   Parking Brake Light Stays On (https://67-72chevytrucks.com/vboard/showthread.php?t=676975)

RB72 07-19-2015 10:56 AM
Parking Brake Light Stays On
 
Does anyone know why my brake light on my dash stays on even after I release it?

geezer#99 07-19-2015 11:18 AM
Re: Parking Brake Light Stays On
 
Maybe that brake light isn't for your park brake!!
It's for your prop valve! Tells you you have a failure in your master cylinder.

franken 07-19-2015 11:36 AM
Re: Parking Brake Light Stays On
 
Pull up on the parking brake pedal and see if it goes out.
It could also be an indication of brake problems.

leftybass209 07-19-2015 12:59 PM
Re: Parking Brake Light Stays On
 
Quote:
Originally Posted by RB72 (Post 7245800)
Does anyone know why my brake light on my dash stays on even after I release it?
These trucks were not equipped with a parking brake indicator. The light you are seeing, as geezer said, is to indicate a fault in the hydraulic aspect of your braking system. Sometimes it comes on due to an incorrectly bled system, or it could be reading that you have a leak and have lost pressure somewhere.

On a side note, there is a diy thread on the forum on how to make the brake light function with the e brake. It's a really cheap and easy mod.

LockDoc 07-19-2015 01:16 PM
Re: Parking Brake Light Stays On
 
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As the others have said that light has nothing to do with your parking brake. Take the cover off of the master cylinder and I will bet that one of the fluid chambers will be dry. That means you have a leak in either the front or rear brake lines or wheel cylinders.....

LockDoc

RB72 07-21-2015 09:51 PM
Re: Parking Brake Light Stays On
 
Quote:
Originally Posted by LockDoc (Post 7245908)
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As the others have said that light has nothing to do with your parking brake. Take the cover off of the master cylinder and I will bet that one of the fluid chambers will be dry. That means you have a leak in either the front or rear brake lines or wheel cylinders.....

LockDoc
You were right my chamber closest to the cab was dry!

LockDoc 07-21-2015 11:08 PM
Re: Parking Brake Light Stays On
 
Quote:
Originally Posted by RB72 (Post 7249609)
You were right my chamber closest to the cab was dry!
If you don't see any fluid leaking from any of the rear lines you will have to pull the rear drums off to see which wheel cylinder is leaking and replace it.... Wait! Is this a C-10 or C-20???

LocDoc

RB72 07-26-2015 10:55 AM
Re: Parking Brake Light Stays On
 
Quote:
Originally Posted by LockDoc (Post 7249724)
If you don't see any fluid leaking from any of the rear lines you will have to pull the rear drums off to see which wheel cylinder is leaking and replace it.... Wait! Is this a C-10 or C-20???

LocDoc
It is a K10!

LockDoc 07-26-2015 12:17 PM
Re: Parking Brake Light Stays On
 
Quote:
Originally Posted by RB72 (Post 7254136)
It is a K10!

OK, I'm not sure which chamber is the front and which chamber is the rear on those. Some of them are the opposite of what you think they would be. I'm still thinking the front one is for the front brakes and the rear is for the rear brakes on the 10's.....

Let us know what you find out on it.

LockDoc

tommys72 07-26-2015 05:09 PM
Re: Parking Brake Light Stays On
 
My light is one too, rear reservoir is almost empty. Investigated a little more, both rear wheel cylinders are leaky! Not so good...thanks guys


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