The driver information center (DIC) switch is a multiplexed switch that functions as a DIC dimmer switch. Battery power is provided to the DIC switch via the instrument panel cluster (IPC) with the DIC switch signal circuit pulled up to battery voltage in the IPC. The IPC also provides the DIC switch with a ground. The switch input to the cluster is pulled low or grounded when a switch is activated. The DIC switch is a momentary contact switch that connects a series of resistors in a resistor ladder format. The IPC monitors the DIC switch signal circuit to determine the DIC switch inputs. Each switch state - Set/Reset, Fuel, Trip, Options, Gage - corresponds to a certain resistance value. The IPC determines the switch state by the voltage drop across the resistors.

Schematic Reference

Instrument Cluster Schematics

Connector End View Reference

Electrical Information Reference

Scan Tool Reference

Scan Tool Data List

1. Ignition OFF, disconnect the harness connector at the DIC switch assembly.
2. Ignition OFF, test for less than 1 ohm of resistance between the DIC switch ground terminal F and ground.

⇒	If greater than 1 ohm, test the ground circuit terminal F for an open/high resistance.

3. Ignition ON, verify that all scan tool DIC Switch parameters are Inactive.

⇒	If any DIC switch parameter(s) is not Inactive, test the suspect switch signal circuit for a short to ground. If the circuit tests normal, replace the IPC.

4. Ignition ON, install a 3A fused jumper wire between the DIC switch signal circuits and the ground circuit. Verify that all scan tool DIC switch parameters are Active.

⇒	If any DIC switch parameter(s) is not Active, test the suspect DIC switch signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the IPC.

5. If all circuits test normal, test or replace the DIC switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.