Pinpoint Test D: The Dome Defeat Feature Is Inoperative

Interior Lighting

Pinpoint Test D: The Dome Defeat Feature Is Inoperative

Refer to Wiring Diagram Set 71, Cluster and Panel Illumination for schematic and connector information Electrical Diagrams.

Normal Operation

The Smart Junction Box (SJB) sends a voltage signal to the instrument panel dimmer switch to monitor the dome defeat input request. When the instrument panel dimmer switch is in the DOME DEFEAT position, the signal is routed to ground indicating a request for the dome defeat feature.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Instrument panel dimmer switch

- SJB (Smart Junction Box)

PINPOINT TEST D : THE DOME DEFEAT FEATURE IS INOPERATIVE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

D1 BYPASS THE INSTRUMENT PANEL DIMMER SWITCH

- Ignition OFF.

- Disconnect: Instrument Panel Dimmer Switch C2065.

- Connect a fused jumper wire between the instrument panel dimmer switch C2065-2, circuit CLN27 (WH/BN), harness side and the instrument panel dimmer switch C2065-4, circuit CLN04 (BU/BN), harness side.





- Close and then open any door.

Do the courtesy lamps illuminate?

Yes
REMOVE the jumper wire. GO to D2.

No
REMOVE the jumper wire. INSTALL a new instrument panel dimmer switch. TEST the system for normal operation.

D2 CHECK THE DOME DEFEAT INPUT CIRCUIT FOR AN OPEN

- Disconnect: SJB (Smart Junction Box) C2280B.

- Measure the resistance between the instrument panel dimmer switch C2298-2, circuit CLN27 (WH/BN), harness side and the SJB (Smart Junction Box) C2280B-36, circuit CLN27 (WH/BN), harness side.





Is the resistance less than 5 ohms?

Yes
GO to D3.

No
REPAIR circuit CLN27 (WH/BN) for an open. TEST the system for normal operation.

D3 CHECK FOR CORRECT SJB (Smart Junction Box) OPERATION

- Disconnect all the SJB (Smart Junction Box) connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect all the SJB (Smart Junction Box) connectors and make sure they seat correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new SJB (Smart Junction Box). TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.