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'brake' light on dash. what does it mean? [message #357882] Thu, 20 August 2020 14:19 Go to next message
cbwoodsr is currently offline  cbwoodsr   United States
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CBWood
77 Kingslay
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Re: 'brake' light on dash. what does it mean? [message #357891 is a reply to message #357882] Thu, 20 August 2020 19:55 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
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'brake' light on dash. what does it mean?

Charles,

It is installed to have two indications:

1 - Indicate that there is an imbalance between the front and rear brake circuits. (You lost a brake system.)
2 - Indicate that the parking brake lever is in the "set" position. This has a high failure rate.

I hope this help.

Matt



Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
Re: 'brake' light on dash. what does it mean? [message #357905 is a reply to message #357891] Fri, 21 August 2020 14:33 Go to previous messageGo to next message
Bill Van Vlack is currently offline  Bill Van Vlack   United States
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Matt..

Where is the actual switch that reports to the "PARK BRAKE" Tell-Tale display?

I see two brake switches on the electrical diagram... One is the "Differential Brake Switch", which I assume is the combination valve. That lights a 'Brake' light on the instrument cluster. The other is an unlabeled switch that lights a section of the Tell Tale display.



Bill Van Vlack '76 Royale; Guemes Island, Washington; Twin bed, full (DS) side bath, Brazilian Redwood counter and settee tops,455, 6KW generator; new owner a/o mid November 2015.

[Updated on: Fri, 21 August 2020 14:33]

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Re: 'brake' light on dash. what does it mean? [message #357906 is a reply to message #357905] Fri, 21 August 2020 16:48 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
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Bill Van Vlack wrote on Fri, 21 August 2020 15:33
Matt..

Where is the actual switch that reports to the "PARK BRAKE" Tell-Tale display?

I see two brake switches on the electrical diagram... One is the "Differential Brake Switch", which I assume is the combination valve. That lights a 'Brake' light on the instrument cluster. The other is an unlabeled switch that lights a section of the Tell Tale display.
Bill,

That switch is just a set of contacts on the outboard side of the parking brake lever. I have seen mine, but it is too close to the side of the cab for me to do anything like make it actually work. If someday I have to have that lever off, then I might go after that as it would be nice to have.

Matt


Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
Re: 'brake' light on dash. what does it mean? [message #357911 is a reply to message #357882] Fri, 21 August 2020 18:20 Go to previous messageGo to next message
Greg C. is currently offline  Greg C.   United States
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Well, I know when I accidentally left my parking brake on while driving the coach from Texas, no lights lit. It was only after the brakes got hot and I glided through a red light with NO brakes that the

"Brake" light came on.

So, on mine at least, I think there is a different (currently non-working) light to indicate stupidity, er, I mean leaving the parking brake on.


Coach is currently in my driveway on blocks undergoing brake renewal.


Greg Crawford KM4ZCR Knoxville, TN "Ruby Sue" 1977 Royale Rear Bath 403 Engine American Eagle Wheels Early Version Alex Sirum Quad bags
Re: [GMCnet] 'brake' light on dash. what does it mean? [message #357915 is a reply to message #357911] Fri, 21 August 2020 18:32 Go to previous message
stu@97381.com, Emery  is currently offline  stu@97381.com, Emery   United States
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There are actually two brake lights on the dash. One in the speedometer cluster is actuated by the switch on the side of the parking bracket by the floor. The other is in the warning light cluster. This is actuated by the Brake combination Switch which is located in the brake lines on the frame inside the driver’s side front wheel. There is a wire on the top that comes on if the spindle inside the switch moves either forward or back indicating a failure or low fluid either in the front or rear brakes.

Emery Stora
77 Kingsley
Frederick CO

> On Aug 21, 2020, at 5:21 PM, Greg Crawford via Gmclist wrote:
>
> Well, I know when I accidentally left my parking brake on while driving the coach from Texas, no lights lit. It was only after the brakes got hot and
> I glided through a red light with NO brakes that the
>
> "Brake" light came on.
>
> So, on mine at least, I think there is a different (currently non-working) light to indicate stupidity, er, I mean leaving the parking brake on.
>
>
> Coach is currently in my driveway on blocks undergoing brake renewal.
> --
> Greg Crawford
> Knoxville, TN
>
> 1977 Royale
> 403
> Rear Bath
> American Eagle Wheels
> Alex Sirum Quad bags
>
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> GMCnet mailing list
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