1

Remove the fog lamp relay and temporarily substitute a known good relay such as the headlamp relay or the illumination lamp relay.

Do the fog lamps work with the substituted relay?

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Go to Step 2

Go to Step 3

1. Return the substituted relay to its original position.
2. Replace the inoperative fog lamp relay.

Did you complete the replacement?

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System OK

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1. Return the substituted relay to its original position, but do not reinstall the fog lamp relay.
2. Using a voltmeter or test lamp, measure the voltage at the fog lamp relay socket terminal 30.

Does the battery voltage available at the fog lamp relay socket measure within the specified range?

11-14 V

Go to Step 5

Go to Step 4

Repair the open circuit between the battery (+) and the fog lamp relay.

Did you complete the repair?

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System OK

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At the fog lamp relay socket, use an ohmmeter or test lamp to verify that the connector for relay terminal 86 is connected to ground.

Does the resistance equal the specified value?

0 ohms

Go to Step 7

Go to Step 6

Repair the ground circuit for the fog lamp relay.

Did you complete the repair?

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System OK

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With the fog lamp relay reinstalled and the switch ON, test for voltage at the fog lamp connector.

Does the battery voltage available at the fog lamp connector measure within the specified range?

11-14 V

Go to Step 9

Go to Step 8

Repair the open circuit between the fog lamp relay terminal 87 and the fog lamp connector.

Did you complete the repair?

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System OK

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Use an ohmmeter or test lamp to measure the ground at the ground side of the fog lamp Connector.

Does the resistance equal the specified value?

0 ohms

Go to Step 11

Go to Step 10

Repair the fog lamp ground circuit.

Did you complete the repair?

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System OK

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Replace the faulty fog lamp bulbs.

Did you complete the repair?

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System OK

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