Fuse Block: Service and Repair

REMOVAL

WARNING: DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

1. Disconnect and isolate the battery negative cable.
2. Remove the fuse cover from the bottom of the Junction Block (JB).
3. Remove the steering column opening cover from the instrument panel. Refer to Steering Column Opening Cover in Body for the location of steering column opening cover removal procedures.

Fig.4 Junction Block Connections:

4. Reach behind the JB to disconnect the two instrument panel wire harness connectors from the Body Control Module (BCM) connector receptacles located near the bottom of the JB (Fig. 4).
5. Reach behind the JB to remove the screw that secures the instrument panel wire harness bulkhead connector to the connector receptacle located near the top of the JB and disconnect the connector.

Fig.5 Junction Block Connections:

6. Disconnect the fused B(+) and the IOD wire harness connectors from the connector receptacles located near the bottom of the JB (Fig. 5).
7. Remove the screws that secure the right and left body wire harness bulkhead connectors to the connector receptacles located near the center of the JB and disconnect the connectors.

Fig.6 Junction Block:

8. Remove the two screws that secure the JB to the instrument panel steering column support bracket (Fig. 6).
9. To disengage the two snap clips that secure the top of the JB to the instrument panel steering column support bracket, grasp the bottom of the junction block firmly with both hands and pull it downward sharply.
10. Remove the JB from the instrument panel steering column support bracket.

INSTALLATION

NOTE: If the Junction Block (JB) is being replaced with a new unit, be certain to transfer each of the optional fuses, circuit breakers and relays from the faulty JB to the proper cavities of the replacement JB. Refer to Junction Block in Wiring Diagrams for the location of complete circuit diagrams and cavity assignments for the JB. The Body Control Module (BCM) must also be transferred to the new JB. Refer to Body Control Module in Electronic Control Modules for the location of the BCM removal and installation procedures.

1. Position the JB into its mounting location on the instrument panel steering column support bracket.
2. Align the snap clips at the top of the JB with the mounting holes in the instrument panel steering column support bracket.
3. Grasp the bottom of the JB firmly with both hands and push it upward sharply to engage the two snap clips that secure the top of the JB to the instrument panel steering column support bracket.
4. Install and tighten the two screws that secure the JB to the instrument panel steering column support bracket. Tighten the screws to 2.2 Nm (20 in. lbs.).
5. Reconnect the right and left body wire harness bulkhead connectors to the connector receptacles located near the center of the JB.
6. Install and tighten the screws that secure the right and left body wire harness bulkhead connectors to the connector receptacles located near the center of the JB. Tighten the screws to 2.2 Nm (20 in. lbs.).
7. Reconnect the fused B(+) and the IOD wire harness connectors to the connector receptacles located near the bottom of the JB.
8. Reach behind the JB to reconnect the instrument panel wire harness bulkhead connector to the connector receptacle located near the top of the JB.
9. Install and tighten the screw that secures the instrument panel wire harness bulkhead connector to the connector receptacle located near the top of the JB. Tighten the screw to 2.2 Nm (20 in. lbs.).
10. Reach behind the JB to reconnect the two instrument panel wire harness connectors to the BCM connector receptacles located near the bottom of the JB.
11. Install the steering column opening cover onto the instrument panel. Refer to Steering Column Opening Cover in Body for the location of the steering column opening cover installation procedures.
12. Install the fuse cover onto the bottom of the JB.
13. Reconnect the battery negative cable.