Component Tests

Tests 1 - 3:

Tests 4 - 8:

Test 9:

SYMPTOM
*BRAKE SWITCH SENSE STATUS DOES NOT CHANGE ON DRBIII(R)

POSSIBLE CAUSES
- Brake lamp switch ground circuit open
- Brake lamp switch sense circuit open
- DRBIII(R) does not show brake SW pressed or released
- Brake lamp switch sense circuit short to ground
- Brake switch (Sense CKT)
- Brake lamp switch output less than 10.0 Volts
- Fused B(+) circuit open
- S/C power supply circuit below 10 Volts at brake switch connection
- Powertrain control module (Brake Sense)