Luggage Compartment Lighting Switch

Fault symptom
The tailgate is disconnected from the alarm system. The LED flashes during the delay period.







Diagnostic procedure
1 Check operation of the lamp, tailgate open/closed
- Connect an Intelligent Saab Tester (ISAT) scan tool.
- Select "READ VALUES".
- Select "TAILGATE SWITCH".
- Open and close the tailgate, observing the ISAT scan tool display at the same time.

The ISAT scan tool display should read "OPEN" and "CLOSED" as appropriate.
Does the display show a correct reading?
[YES] Proceed to point 6.
[NO] Continue with point 2.

2 Check the microswitch
- Unplug the luggage compartment connector, H6-8.
- Select "TAILGATE SWITCH".
The ISAT scan tool should display "OPEN".
- Connect a jumper lead between pins 5 and 6 of connector H6-8.
The ISAT scan tool should display "CLOSED".

Does it display the correct readings?
[YES] Proceed to point 6.
[NO] Continue with point 3.







3 Check the microswitch's power supply
Connect the test lamp to pin 6 of connector H6-8 and a good grounding point.

Does it light up?
[YES] Continue with point 4.
[NO] Continue with point 5.

4 Check the connection to ground
- Check the lamp, connector and wiring.
- Check for continuity between pin 5 of the connector and a good grounding point.

The resistance should be < 1 ohm.
Is the resistance OK?
[YES] Proceed to point 6.
[NO] Repair or replace the wiring harness.







5 Check the wiring
Check the wiring for continuity between pin 6 of the connector and pin 3 of the alarm control module.

The resistance should be < 1 ohm.
Is the resistance OK?
[YES] Proceed to point 6.
[NO] Repair or replace the wiring harness.

6 Final test
Check to see if the fault symptom persists.

Does the trouble persist?
[YES] Continue as described in "Before Changing the Electronic Control Module". Before Changing the Electronic Control Module
[NO] The remedial measure taken was correct or the fault is of intermittent nature.