Component Tests

Tests 1 - 3:

Tests 4 - 8:

Test 9:

SYMPTOM
BRAKE SWITCH SENSE STATUS DOES NOT CHANGE ON DRB

POSSIBLE CAUSES
- DRB III Does Not Show Brake SW Pressed Or Released
- Fused B(+) Circuit Open
- Brake Lamp Switch Ground Circuit Open
- Brake Switch (Sense CKT)
- Brake Lamp Switch Sense Circuit Open
- Brake Lamp Switch Sense Circuit Short To Ground
- Brake Lamp Switch Output Less Than 10.0 Volts
- S/C Power Supply Circuit Below 10 Volts At Brake Switch Connector.
- Powertrain Control Module (Brake Sense)