[Porschedude]

Which light did you say comes on intermittently?

There are actually three functional lights and one general warning light "!".

Brake Pressure/Fluid Level = "BRAKE"
Problems:
Brake Fluid Pressure Differential in Hyd. Circuit
Brake Pressure Switch Failure
Low fluid in Brake Reservoir
Low Fluid Switch (Switch State: Normally Closed with full fluid)
Sensor circuit for Brake Reservoir open

2. Brake Wear = “symbol looks like a brake drum and shoes?”
Circuit State: Normally Closed Loop
Problems:
Brake sensor bridge wire worn through or broken
Brake sensor wire harness open condition


3. Parking Brake = "PARKING BRAKE"
Switch State: Normally open
Problems:
Parking Brake Switch adjustment