Relay Box: 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 steering column opening cover (2). This is accomplished by pulling outward on the upper edge of the cover to disengage the retaining clips and removing the screw at the bottom of the cover.




3. Disconnect the two bottom side Junction Block (JB) connectors.




4. Reach behind the JB to disconnect the top side JB connector.




5. Remove the screws (1) that secure the JB to the mounting bracket.
6. Disengage the two snap clips (2) that secure the top of the JB to the mounting bracket. Push the top of the junction block out of the top of the bracket and pull it upward to disengage the lower retaining tabs (3).
7. Remove the JB from the vehicle by lowering out of the opening at the bottom of the instrument panel.

INSTALLATION

NOTE: If the Junction Block (JB) is being replaced with a new unit, be certain to transfer each of the fuses, circuit breakers and relays from the inoperative 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.




1. Position the JB into its mounting location on the JB mounting bracket.
2. Align the two lower retaining tabs (3) with the slots in the bottom of the bracket.
3. Align the snap clips (2) at the top of the JB with the mounting slots in the top of the bracket.
4. Grasp the JB firmly with both hands and push it into the bracket to engage the two snap clips (2) that secure the top of the JB.
5. Install and tighten the four screws (1) that secure the JB to the mounting bracket. Tighten the screws to 2 N.m (20 in. lbs.).




6. Reconnect the top side wire harness connector to the connector receptacle on the JB.




7. Reconnect the bottom side wire harness connectors to the connector receptacles on the JB.




8. Install the steering column opening cover (2). Install the screw and firmly push the top of the panel inward to engage the top retaining clips.
9. Reconnect the battery negative cable.