Brake Pressure Warning buzzer?

[Jaybus]

1986 bluebird international 7.3 8 cyll.
Electrical brakes.

The batteries were allowed to drain, however upon recharging the Brake Pressure Warning light goes on at intermittent times.
The brake lights are all fine,

What is the Brake Pressure Warning light telling me?

 

[GreyEagle-SKO]

If it has AIR BRAKES.... It's telling you . low air pressure do not drive!!!

 

[Jaybus]

Its stated on the dash its electrical brakes. Also when I registered it it was not air.
I know what its telling me, but how can I track a short and or how do I deal with a random flickering light.

I know nothing is actually wrong, its flickering like crazy.

Also the bus was sitting for 2 years.
Id at least like some info on how or where to look, im told this is common when the lights are either out or rusty and also a relay can go out often.

I'm no expert and the bus stops fine.

Was wondering if the dash panel should be taken off and checked for corroded wires or where the relay is located?

Thanks.

 

[bansil]

is it the same light for the parking brake?maybe the release isn't set all the way

 

[GreyEagle-SKO]

Possible wheel brake sensor ....????
I'll just pulling straws and taking wild guesses. here....

 

[Crazy]

You should move this to mechanical section.