For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Fog Lights Diagnostic System Check? | -- | Go to Step 2 | Go to Fog Lights System Check
2 |

1. Disconnect the multifunction relay K134 connector.
2. Turn the ignition switch to the ON position.
3. Use the DMM in order to measure the voltage between terminal 10 of the multifunction relay K134 connector and a known good ground.

Is the measured voltage within the specified value?

B+

Go to Step 4

Go to Step 3

3 |

1. Locate an open or a high resistance in circuit X820.
2. Repair the open or the high resistance in CKT X820.

Is the repair complete?

--

Go to Step 19

--

4 |

1. Turn the headlamp switch to the PARK position.
2. Use the DMM in order to measure the voltage between terminal 3 of the multifunction relay K134 connector and a known good ground.

Is the measured voltage within the specified value?

B+

Go to Step 6

Go to Step 5

5 |

1. Locate an open or a high resistance in CKT RF75.
2. Repair the open or the high resistance in CKT RF75.

Is the repair complete?

--

Go to Step 19

--

6 | Use the DMM in order to measure the voltage between terminal 1 of the multifunction relay K134 connector and a known good ground. Is the measured voltage within the specified value? | B+ | Go to Step 8 | Go to Step 7
7 |

1. Locate an open or a high resistance in CKT FA888.
2. Repair the open or the high resistance in CKT FA888.
3. If CKT FA888 is OK, replace the right high beam headlamp relay K132.

Did you complete the repair?

--

Go to Step 19

--

8 |

1. Disconnect the headlamp switch connector.
2. Use the DMM in order to measure the resistance between terminal 13 of the headlamp switch connector and a known good ground.

Is the measured resistance less than the specified value?

5 ohms

Go to Step 10

Go to Step 9

9 |

1. Locate an open or a high resistance in CKT F18.
2. Repair the open or the high resistance in CKT F18.

Did you complete the repair?

--

Go to Step 19

--

10 | Use the DMM in order to measure the resistance between terminal 10 of the headlamp switch connector and terminal 8 of the multifunction relay K134 connector. Is the measured resistance less than the specified value? | 5 ohms | Go to Step 12 | Go to Step 11
11 |

1. Locate an open or a high resistance in CKT FP28.
2. Repair the open or the high resistance in CKT FP28.

Did you complete the repair?

--

Go to Step 19

--

12 |

1. Connect the multifunction relay K134 connector.
2. Connect a fused jumper between terminal 10 and 13 of the headlamp switch connector.

Do the fog lamps turn ON?

--

Go to Step 13

Go to Step 14

13 | Replace the fog lamp switch. Refer to Headlamp Switch Replacement in Lighting Systems. Did you complete the repair? | -- | Go to Step 19 | --
14 |

1. Disconnect both the left and the right fog lamp.
2. Use the DMM in order to measure the voltage between terminal 1 of the left fog lamp and a known good ground.
3. Use the DMM in order to measure the voltage between terminal 1 of the right fog lamp and a known good ground.

Is the measured voltage for both measurements within the specified value?

B+

Go to Step 16

Go to Step 15

15 |

1. Locate and repair an open or a high resistance in circuits FP1, FP2, FP3, FP27, FP50and/or FP36.
2. Repair the open or the high resistance in circuits FP1, FP2, FP3, FP27, FP50 and/or FP36.
3. If these circuits are OK, replace the multifunction relay K134.

Did you complete the repair?

--

Go to Step 19

--

16 |

1. Use the DMM in order to measure the resistance between terminal 2 of the left fog lamp and a known good ground.
2. Use the DMM in order to measure the resistance between terminal 2 of the right fog lamp and a known good ground.

Is the measured resistance for both measurements less than the specified value?

5 ohms

Go to Step 18

Go to Step 17

17 |

1. Locate an open or a high resistance in circuits F1, F3 and/or F4.
2. Repair the open or the high resistance in circuits F1, F3 and/or F4.

Did you complete the repair?

--

Go to Step 19

--

18 | Replace the left and/or right fog lamps. Refer to Front Fog Lamp Bulb Replacement in Lighting Systems. Did you complete the repair? | -- | Go to Step 19 | --
19 |

1. Connect all connectors and components that were previously disconnected.
2. Verify that the fog lamps operate properly.

Do the fog lamps operate properly?

--

Go to Fog Lights System Check

Go to Step 1