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Home >> Chevrolet >> 2005 >> Aveo Base, 4D Hatchback >> Repair and Diagnosis >> External Pages >> Different car >> Section 64 (Lighting Systems) >> Diagnostic Information and Procedures >> Front Fog Lamps Inoperative (Hatchback) >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2008 Suzuki Swift +, 2008 Pontiac Wave, and 2008 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.

The front fog lamps will not operate unless the illumination lamps or daytime running lamps are on. If the illumination lamps or daytime running lamps are not operating, repair that problem before attempting to diagnose the fog lamps.

Step Action Values Yes No
1 Test fuse EF9.
Is fuse EF9 open?		 - Go to Step 2  Go to Step 3 
2
  1. Test for a short circuit and repair, if necessary.
  2. Replace the fuse.
Is the repair complete?		 - System OK -
3 Use a voltmeter to test fuse EF9.
Does the battery voltage available at fuse EF9 equal the specified value?		 11-14 V Go to Step 5  Go to Step 4 
4 Repair the open circuit from the battery to fuse EF9.
Is the repair complete?		 - System OK -
5 Remove the fog lamp relay and temporarily substitute a known good relay, such as the headlamp relay. Do not substitute the illumination lamp relay.
Do the fog lamps work with the substituted relay?		 - Go to Step 6  Go to Step 7 
6
  1. Return the substituted relay to its original position.
  2. Replace the inoperative fog lamp relay.
Is the repair complete?		 - System OK -
7
  1. Return the substituted relay to its original position, but do not reinstall the fog lamp relay.
  2. Turn ON the exterior lamps and the front fog lamps.
  3. Using a voltmeter, test the fog lamp relay socket at the connector for fog lamp relay terminal 30.
Does the voltage available at the fog lamp relay socket equal the specified value?		 11-14 V Go to Step 9  Go to Step 8 
8 Repair the open circuit between fuse EF9 and the fog lamp relay.
Is the repair complete?		 - System OK -
9 At the fog lamp relay socket, use an ohmmeter to verify that the connector for relay terminal 86 is connected to ground.
Does the ohmmeter indicate continuity?		 - Go to Step 11  Go to Step 10 
10 Repair the ground circuit for the fog lamp relay.
Is the repair complete?		 - System OK -
11
  1. Reinstall the fog lamp relay.
  2. Turn ON the exterior lamps and the front fog lamps.
  3. Test for voltage at terminal 1 of the fog lamp connector.
Does the battery voltage available at terminal 1 of the fog lamp connector equal the specified value?		 11-14 V Go to Step 13  Go to Step 12 
12 Repair the open circuit between the fog lamp relay terminal 87 and the fog lamps.
Is the repair complete?		 - System OK -
13 Use an ohmmeter, or test lamp, to test the ground at terminal 2 of the fog lamp connector.
Does the ohmmeter indicate continuity?		 - Go to Step 15  Go to Step 14 
14 Repair the fog lamp ground circuit.
Is the repair complete?		 - System OK -
15 Replace the faulty fog lamp bulbs. Refer to Front Fog Lamp Replacement (Notchback)  or Front Fog Lamp Replacement (Hatchback) .
Is the repair complete?		 - System OK -
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