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Home >> Saab >> 1999 >> 9-3 Convertible (9400) L4-2.0L Turbo (B204) >> Repair and Diagnosis >> Instrument Panel, Gauges and Warning Indicators >> Instrument Cluster / Carrier >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Warning and Indicator Lamps Controlled By Main Instrument Unit

Warning and Indicator Lamps Controlled By Main Instrument Unit








Warning And Indicator Lamps Controlled By Main Instrument Unit

This applies to the following lamps:
- Central warning lamp
- Door indicator lamp with associated doors
- Direction indicator repeater lamp, LH
- Direction indicator repeater lamp, RH
- Indicator lamp INFO DISPL
- Indicator lamp, rear fog light
- Selector lever position indicator lamps (P.R.N.D.3.2.1)
- Fuel reserve indicator lamp
- Warning lamp, brake fluid level

Fault symptoms
One of the listed lamps does not work.

Diagnostic help
The lamps can be activated with the diagnostic tool. For fault diagnosis of the bus, see Bus and Diagnostics communication. See Computers and Control Systems.

Check the wiring harness
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short-circuits in the leads. Observe the multimeter, test lamp or diagnostic tool during the test.

Diagnostic procedure

1. Check the defective component
- Which component caused the fault?






CENTRAL WARNING LAMP
- Go to step 2.

DOOR INDICATOR LAMP
- Go to step 3.

FRONT LEFT DOOR LAMP
- Go to step 4.

REAR LEFT DOOR LAMP
- Go to step 5.

FRONT RIGHT DOOR LAMP
- Go to step 6.

REAR RIGHT DOOR LAMP
- Go to step 7

LAMP, TAILGATE
- Go to step 8

NONE OF THE ABOVE
- Go to step 9.

2. Checking the lamp
- Contact Main instrument unit.






- Activate: Central warning lamp (ON).
- The lamp should light.






Is the function correct?
YES
- See fault diagnosis of system in question.
- Go to step 16.
NO
- Check and replace faulty bulb.
- Go to step 16.

3. Checking the lamp
- Contact Main instrument unit.






- Activate: Lamp, Door indicator (ON).
- The lamp should light.






Is the function correct?
YES
- See fault diagnosis of system in question.
- Go to step 16.
NO
- Check and change the faulty bulb.
- Go to step 16.

4. Checking the lamp
- Contact Main instrument unit.






- Activate: Lamp, Door LH front (ON).
- The lamp should light.






Is the function correct?
YES
- See fault diagnosis of system in question.
- Go to step 16.
NO
- Go to step 16.

5. Checking the lamp
- Contact Main instrument unit.






- Activate: Lamp, Door LH rear (ON).
- The lamp should light.






Is the function correct?
YES
- See fault diagnosis of system in question.
- Go to step 16.
NO
- Go to step 16.

6. Checking the lamp
- Contact Main instrument unit.






- Activate: Lamp, Door RH front (ON).
- The lamp should light.






Is the function correct?
YES
- See fault diagnosis of system in question.
- Go to step 16.
NO
- Go to step 16.

7. Checking the lamp
- Contact Main instrument unit.






- Activate: Lamp, Door RH rear (ON).
- The lamp should light.






Is the function correct?
YES
- See fault diagnosis of system in question.
- Go to step 16.
NO
- Go to step 16.

8. Checking the lamp
- Contact Main instrument unit.






- Activate: Lamp, Tailgate (ON).
- The lamp should light.






Is the function correct?
YES
- See fault diagnosis of system in question.
- Go to step 16.
NO
- Go to step 16.

9. Check the defective component, continued
- Which component caused the fault?






LH DIRECTION INDICATOR LAMP
- Go to step 10.

RH DIRECTION INDICATOR LAMP
- Go to step 11.

LAMP, INFO DISPL
- Go to step 12.

TANK EMPTY LAMP
- Go to step 13.

LAMP, REAR FOG LIGHT
- Go to step 14

CRUISE LAMP
- Go to step 15

NONE OF THE ABOVE
- See fault diagnosis of system in question.
- Go to step 16

10. Checking the lamp
- Contact Main instrument unit.






- Activate: Lamp, Direction indicators LH (ON).
- The lamp should light.






Is the function correct?
YES
- See fault diagnosis of system in question.
- Go to step 16.
NO
- Check and replace faulty bulb.
- Go to step 16.

11. Checking the lamp
- Contact Main instrument unit.






- Activate: Lamp, Direction indicators RH (ON).
- The lamp should light.






Is the function correct?
YES
- See fault diagnosis of system in question.
- Go to step 16.
NO
- Check and replace faulty bulb.
- Go to step 16.

12. Checking the lamp
- Contact Main instrument unit.






- Activate: Lamp, Info Displ (ON).
- The lamp should light.

Is the function correct?
YES
- See fault diagnosis of system in question.
- Go to step 16.
NO
- Check and replace faulty bulb.
- Go to step 16.

13. Checking the lamp
- Contact Main instrument unit.






- Activate: Lamp, Empty Tank (ON).
- The lamp should light.






Is the function correct?
YES
- See fault diagnosis of system in question.
- Go to step 16.
NO
- Check and replace faulty bulb.
- Go to step 16.

14. Checking the lamp
- Contact Main instrument unit.






- Activate: Lamp, Rear Fog Light (ON).
- The lamp should light.






Is the function correct?
YES
- See fault diagnosis of system in question.
- Go to step 16.
NO
- Check and replace faulty bulb.
- Go to step 16.

15. Checking the lamp
- Contact Main instrument unit.






- Activate: CRUISE Lamp (ON).
- The lamp should light.






Is the function correct?
YES
- See fault diagnosis of system in question.
- Go to step 16.
NO
- Check and replace faulty bulb.
- Go to step 16.

16. Final check
- Clear the diagnostic trouble codes in all systems.






- Perform a functional test.






Is the function correct?
YES
- The steps taken to rectify the fault were correct.
NO
- See Fault diagnosis, general, "Before changing a control module." Before Changing A Control Module
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