Dodge ZB 2005 - Brake Lamp Switch Inoperative

Symptom:
*BRAKE LAMP SWITCH INOPERATIVE
POSSIBLE CAUSES
CHECK BRAKE LAMP SWITCH OUTPUT
BRAKE LAMP SWITCH B+ OPEN
BRAKE LAMP SWITCH OPEN
BRAKE LAMP SWITCH OUTPUT CIRCUIT SHORT OR OPEN
CAB -- INTERNAL OPEN
TEST ACTION APPLICABILITY
1 With the DRBIIIt in Inputs/Outputs, read the Brake Lamp Switch state.
Press and release the brake pedal.
Does the DRBIIIt display PRESSED and RELEASED?
All
Yes → The Brake Lamp Switch is OK.
Perform ABS VERIFICATION TEST - VER 1.
No → Go To 2
2 Disconnect the Brake Lamp Switch harness connector.
Using a 12-volt test light connected to ground, check the Brake Lamp Switch Fused
B+ circuit.
Does the test light illuminate brightly ?
All
Yes → Go To 3
No → Repair the Brake Lamp Switch Fused B+ circuit for an open.
Perform ABS VERIFICATION TEST - VER 1.
3 Disconnect the Brake Lamp Switch harness connector.
Connect a jumper wire between the Brake Lamp Switch B+ and Brake Lamp Switch
Output circuits.
With the DRBIIIt in Inputs/Outputs, read the Brake Lamp Switch state.
Does the DRBIIIt display PRESSED?
All
Yes → Replace the Brake Lamp Switch in accordance with the Service
Information.
Perform ABS VERIFICATION TEST - VER 1.
No → Go To 4
4 Disconnect the CAB harness connector.
Disconnect the Brake Lamp Switch harness connector.
Check the Brake Lamp Switch Output circuit for a short to voltage and for an open.
Is the Brake Lamp Switch Output circuit shorted or open?
All
Yes → Repair the Brake Lamp Switch Output circuit for a short to
voltage or an open.
Perform ABS VERIFICATION TEST - VER 1.
No → Replace the Controller Antilock Brake in accordance with the
Service Information.
Perform ABS VERIFICATION TEST - VER 1.
37
BRAKES (CAB)