Brake Switch Sense Status Does Not Change on DRB

Test 1 - 3:

Test 4 - 8:

Test 9:

SYMPTOM
BRAKE SWITCH SENSE STATUS DOES NOT CHANGE ON DRBIII

POSSIBLE CAUSES
- DRBIII Does not show brake SW pressed or released
- (A108) fused B+ circuit open
- (Z241) brake lamp switch ground circuit open
- Brake lamp switch
- (K29) Brake lamp switch signal circuit open
- (K29) Brake lamp switch signal circuit short to ground
- (K29) Brake lamp switch signal less than 100 volts
- (V32) S/C Power supply circuit below 10 volts at brake switch CONN
- PCM