Circuit/System Testing

Ignition OFF, disconnect the harness connector at the A23E Door Latch Assembly - Endgate.
Connect a test lamp between the control circuit terminal 1 and control circuit terminal 2, ignition ON.
Verify the test lamp turns ON and OFF when commanding the All Doors Lock/Unlock with a scan tool.
- If the test lamp remains OFF during either of the commands
1. Ignition OFF, remove the test lamp, disconnect the X6 harness connector at the K9 Body Control Module.
2. Test for infinite resistance between each control circuit and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance, refer to Power Door Locks Malfunction (Crew Cab) , or Power Door Locks Malfunction (Extended Cab)
3. Test for less than 2 Ω in each control circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, refer to Power Door Locks Malfunction (Crew Cab) , or Power Door Locks Malfunction (Extended Cab) .
- If the test lamp is always ON
1. Ignition OFF, remove the test lamp, disconnect the X6 harness connector at the K9 Body Control Module, ignition ON.
2. Test for less than 1 V between each control circuit and ground.
  - If 1 V or greater, repair the short to voltage on the circuit.
  - If less than 1 V, refer to Power Door Locks Malfunction (Crew Cab) , or Power Door Locks Malfunction (Extended Cab) .
- Go to next step: If the test lamp turns ON and OFF
Test or replace the A23E Door Latch Assembly - Endgate.