Interior Lighting Inoperable

If interior lighting delay is inoperable, go to step 8). If interior lighting delay does not turn off, go to step 9). If interior lighting is inoperable, ensure ignition is off. Remove fuse No. 15 and interior lighting bulb. See Figure . Replace as necessary. If fuse and bulb are okay, go to next step.
Ensure ignition is off. Check if interior lighting can be turned on and off using switch on passenger compartment dome light. If interior lighting can be turned on and off, go to next step. If interior lighting cannot be turned on and off, check for open circuit in wiring between fuse No. 15 and dome light.
Ensure ignition is off. Set dome light to come on when door opens. Remove central locking relay. See Figure . Connect voltmeter between relay connector terminals LA and No. 31. Voltmeter should read about zero volts. Remove voltmeter leads and connect jumper wire between relay connector terminals LA and No. 31. If interior lighting comes on, go to next step. If voltmeter reads more than one volt, check for short to voltage in interior lighting signal wire between central locking relay connector terminal LA and dome light. If interior lighting does not come on, check for short circuit in interior lighting signal wire between central locking relay connector terminal LA and dome light.
Ensure ignition is off. Set dome light to come on when door opens. Remove central locking relay. Close door and trunk/tailgate. Connect jumper wire between relay connector terminals LA and "T". See Figure . If interior lighting comes on when any door is opened, check interior lighting ground wire for an open circuit. If interior lighting does not come on, go to next step.
Ensure ignition is off. Reinstall central locking relay. Remove all door panels. Disconnect central locking module connectors. Connect ohmmeter between central locking module 14-pin connector terminals No. 6 and 14. See Figure . Ohmmeter should read zero ohms with door open and infinite resistance with door closed. If readings are correct, go to next step. If readings are not correct, check for open circuit in central locking module interior lighting switch or wiring harness. If switch and harness are okay, replace central locking module.
Ensure ignition is off, all door panels are removed, and central locking module connectors are disconnected. Connect ohmmeter between central locking module 14-pin connector terminal No. 14 and ground. See Figure . Ohmmeter should read zero ohms. Connect ohmmeter between 8-pin connector terminal No. 5 and ground. See Figure . Ohmmeter should read zero ohms.
If readings are correct, check for open circuit in wiring between 14-pin connector terminal No. 2 and central locking relay connector terminal "T" (front doors), or 8-pin connector terminal No. 8 and central locking relay connector terminal "T". If readings are incorrect, check ground wire between 14-pin connector terminal No. 14 and "A" pillar ground (front doors), or 8-pin connector terminal No. 5 and left/right crossmember ground. See Figure and Figure .
If interior lighting delay is inoperable, ensure ignition is off. Remove central locking relay. Turn ignition on. Connect voltmeter between relay connector terminals No. 15 and 31. See Figure . If voltmeter reads zero volts, check interior lighting ground. If voltmeter does not read zero volts, check for short to voltage in wiring between fuse No. 3 and relay connector terminal No. 15.
If interior lighting delay does not turn off, turn ignition on. Remove central locking relay. Connect voltmeter between relay connector terminals No. 15 and 31. See Figure . If voltmeter does not read battery voltage, go to next step. If voltmeter reads battery voltage, check interior lighting ground for an open circuit.
Ensure ignition is off. Remove fuse No. 3. Replace as necessary. Turn ignition on. Check voltage supply to fuse No. 3. If voltage is present, check wiring between fuse terminal and central locking relay connector terminal No. 15 for an open circuit. See Figure . If voltage is not present, check for open circuit in voltage supply to fuse No. 3.