flashing lights above rear brake wheel on ge loco

Trains Magazine Locomotives
1

I dont know the loco type but im sure it is a ge dash 80 the lights flashing were below the gull wing rad at the rear above brake wheel on a metal plate ?What are they for?

2

They are white lights three in total

3

Indicator lights for the handbrake. Applied or released, automatic or manual mode.

4

Great thanks