For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the entire Headlight Door System Check performed? | -- | Go to Step 2 | Go to Headlight Doors System Check
2 |

1. Disconnect the headlamp opening door actuator control module connector C1.
2. Connect a test light between the headlamp connector terminal E or B and ground.
3. Turn the headlamp switch to the HEAD position.

Does the test light illuminate?

9 - 14 V

Go to Step 3

Go to Step 4

3 |

1. Disconnect the headlamp opening door actuator control module connector C2.
2. Disconnect C160 (LH) or C165 (RH).
3. Check for a short to B+ in circuits 576 and 577 (LH) or 578 and 579 (RH).

Is a short to B+ present?

--

Go to Step 5

Go to Step 6

4 | Check for a short to ground in circuits 576 and 577 (LH) or 578 and 579 (RH). Is a short to ground present? | -- | Go to Step 7 | Go to Step 8
5 | Repair a short to B+. Is the repair complete? | -- | Go to Step 13 | --
6 | Check for continuity in circuits 576 and 577 (LH) or 578 and 579 (RH). Is there continuity? | -- | Go to Step 9 | Go to Step 10
7 | Repair the short to ground. Is the repair complete? | -- | Go to Step 13 | --
8 | Repair the open in circuit 840 or 740. Is the repair complete? | -- | Go to Step 13 | --
9 |

1. Reconnect the headlamp door actuator control module connectors C1 and C2.
2. Place the headlamp switch in the HEAD position.
3. Using a test light probe between the inoperative motor connector terminals A and B.

Does the test light illuminate?

--

Go to Step 11

Go to Step 12

10 | Repair the poor conection or open. Is the repair complete? | -- | Go to Step 13 | --
11 | Replace the inoperative headlamp door motor. Is the repair complete? | -- | Go to Step 13 | --
12 | Replace the headlamp opening door actuator control module. Refer to Headlamp Door Module Replacement Is the repair complete? | -- | Go to Step 13 | --
13 |

1. Turn the ignition switch to the OFF position.
2. Reconnect all connectors/components removed.

Have all the repairs been made?

--

Go to Headlight Doors System Check

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