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Author Topic: Dash brake light  (Read 540 times)

Offline MY1978

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Dash brake light
« on: June 21, 2026, 12:58:50 pm »
Hello, I have a new issue.

My dash brake light is stuck on even while in drive.  I have depressed the emergency brake and released several times but it doesn't go out.  I have checked the fluid level and it is fine.  Every once in a GREAT while, it will go out.  Today I ran a couple of errands and drove for over an hour and the light stayed on.  Any suggestions/thoughts? 
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Online bd

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Re: Dash brake light
« Reply #1 on: June 21, 2026, 03:08:18 pm »
Is there any pattern as to when the brake warning lamp extinguishes?  Unplug the tan/wht wire from the brake combination valve to see whether the brake warning lamp goes off and remains off.
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Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline MY1978

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Re: Dash brake light
« Reply #2 on: June 21, 2026, 03:48:58 pm »
No, no pattern.  I assume the brake combination valve is under the hood?  I will try that tomorrow.

**I found an explanation as to where it is.  I will try that tomorrow**
« Last Edit: June 21, 2026, 03:54:53 pm by MY1978 »
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Online bd

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Re: Dash brake light
« Reply #3 on: June 21, 2026, 04:20:11 pm »
The brake combination valve is a roughly 2.5" x 5" x 1" brass block that has 5 brake lines running to it and a single-pin switch that connects to the tan/wht wire for the brake warning lamp.
« Last Edit: June 21, 2026, 10:12:46 pm by bd »
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Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline MY1978

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Re: Dash brake light
« Reply #4 on: June 21, 2026, 04:33:11 pm »
Thank you
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Offline VileZambonie

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Re: Dash brake light
« Reply #5 on: June 23, 2026, 04:37:28 pm »
There is a connector for it near the steering box. Just unplug it there.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline MY1978

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Re: Dash brake light
« Reply #6 on: June 23, 2026, 04:39:49 pm »
Thanks.  So I do not need to shimmy under the truck.  Nice.  I am so afraid I will break it when I unplug it because EVERYTHING is old on this truck.  Wish me luck.

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Offline VileZambonie

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Re: Dash brake light
« Reply #7 on: June 23, 2026, 04:50:18 pm »
See image
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,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10
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