Circuit/System Testing

DIC Switches

1. Ignition OFF, disconnect the harness connector at the driver information center (DIC) switch assembly.
2. Ignition OFF, verify a test lamp does not illuminate when connected between the DIC switch signal circuit terminal 9 and ground.
   • If the test lamp illuminates, check the DIC switch signal circuits for a short to voltage. If all circuits test normal, replace the IPC.
3. If all circuits tests normal, test or replace the DIC switch.

HUD Switches

1. Ignition OFF, disconnect the harness connector at the HUD switch.
2. Verify all of the scan tool HUD Switch parameters are Inactive.
   • If not Inactive, replace the HUD.
3. Ignition ON, install a 3-amp fused jumper wire between the following HUD Up/Down/Page switch terminals and ground. Verify the scan tool HUD Switch parameters are Active.
   • Terminal 4
   • Terminal 6
   • Terminal 7
   • If not Active, test the appropriate signal circuit for a short to voltage. If the circuits test normal, replace the HUD.
4. If all circuits test normal, test or replace the HUD switch assembly.