D 350 Pickup L6-359 5.9L DSL (1989)
Brake Warning Indicator: Description and Operation
BRAKE LIGHT
The Brake light is connected to a sensor that monitors vacuum in the brake booster system. The Brake light when lit indicates LOW VACUUM. If
this light is lit, the brake system must be serviced*.
* NOTE: This maintenance procedure must be performed by a trained service technician.
NOTE: The brake light will also be activated when the Park Brake is applied or in the event of a hydraulic brake failure.
