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Old 04-17-2017, 09:34 AM   #1
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Unmarked yellow light next to dash

To the left of the main dash cluster there is an unmarked yellow indicator light that is only illuminated when I press on the brake pedal. My rig is a 2001 International/Bluebird with air brakes. The brakes seem to be pressurized properly at about 120 psi on the gauge, and the buzzer isn't going off. Not sure what this is, haven't been able to find much via Google searches.
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Old 04-20-2017, 02:23 PM   #2
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Do you have any pictures?
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Old 04-20-2017, 02:30 PM   #3
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Just a shot in the dark here but could it be an abs thing?
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Old 04-20-2017, 03:54 PM   #4
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don't know if this helps, but I have a light that comes on when I step on the pedal... I noticed it the first time I drove the bus. according to the salesman and a bus mechanic (not from the dealership lol) in transit style busses they often have a light to indicate when the brake pedal activates the brake lights.
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Old 04-24-2017, 09:42 AM   #5
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Picture attached, I have my foot on the brake pedal.
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Old 04-24-2017, 10:28 AM   #6
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Service Manuals for Blue Bird School Buses
you can try looking through the manual. it may be in there.
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Old 04-24-2017, 11:03 AM   #7
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Service Manuals for Blue Bird School Buses
you can try looking through the manual. it may be in there.
That's a great resource, thanks! Haven't found anything yet, I wonder if this is the old style burnt out brake light indicator?

Also, do any buses have has a worn out brake pad sensor/indicator ?
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Old 04-24-2017, 12:14 PM   #8
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I can't figure out the purpose of that light either. You certainly don't need a light to tell you if the brakes are working. Does your bus have one of the external light monitors? It could be a mechanic's version of a light monitor.
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Old 04-24-2017, 12:25 PM   #9
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brake switch failures are common on school busses.. they may have had issues and put that light in... Ive never seen one as a stocker on a bus...
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Old 04-24-2017, 01:02 PM   #10
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I'm not understanding that very well. If I'm driving a bus down the road and the brakes don't work, I'm not going to check the yellow light to confirm I have no working brakes. Could it just be a mechanic's version of the exterior light monitor to confirm brake lights?
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Old 04-24-2017, 02:00 PM   #11
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You have an international dash? My bus has the Bluebird dash. They have the tail light indicator on the dash... Maybe someone added it. See if the wires go down to the brake pedal where the switch for the brake lights is.

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Old 04-24-2017, 02:11 PM   #12
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My BlueBird has a Chevy S-10 dash.
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Old 04-24-2017, 03:21 PM   #13
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My BlueBird has a Chevy S-10 dash.
Air brakes?

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Old 04-24-2017, 03:41 PM   #14
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Yup. Very manly air brakes like real trucks have.
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Old 04-24-2017, 05:02 PM   #15
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Yup. Very manly air brakes like real trucks have.
I am pretty sure it's a brake light indicator. I don't know why, but they seem to be on quite a few busses. You should trace the wires, just to make sure. I bet they go straight to the pedal switch.

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Old 04-24-2017, 05:59 PM   #16
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My '02 Bluebird has a "service brake indicator" that comes on whenever the brakes are applied.

I had the same question and finally found the answer in the operators manual online.

To be clear. Mine also has an "ABS Fault" light and it is red.
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Old 04-24-2017, 06:04 PM   #17
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Quote:
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My '02 Bluebird has a "service brake indicator" that comes on whenever the brakes are applied.

I had the same question and finally found the answer in the operators manual online.

To be clear. Mine also has an "ABS Fault" light and it is red.
My abs fault light is yellow. And my service brake indicator is red.
Both are on my dashboard.

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