For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
DEFINITION: Only the LH backup lamp illuminates.
1 | Did you perform the Backup Lights Diagnostic System Check? | -- | Go to Step 2 | Go to Backup Lamp System Check
2 |

1. Turn on the ignition.
2. Move the automatic transmission control lever to the REVERSE position.

Did the RH backup lamp illuminate?

--

Go to Step 7

Go to Step 3

3 |

1. Disconnect the RH backup lamp connector.
2. Use a DMM in order to measure the voltage between terminal B of the RH lamp connector and a known good ground.

Does the voltage measure near the specified value?

B+

Go to Step 5

Go to Step 4

4 |

1. Locate an open or a high resistance in CKT MF1.
2. Repair the open or the high resistance in CKT MF1.

Did you complete the repair?

--

Go to Step 9

--

5 | Use the DMM in order to measure the resistance between terminal A of the RH backup lamp connector and a known good ground. Does the resistance measure less than the specified value? | 5 ohms | Go to Step 9 | Go to Step 6
6 |

1. Locate an open or a high resistance in CKT F2.
2. Repair the open or the high resistance in CKT F2.

Did you complete the repair?

--

Go to Step 8

--

7 | Use a DMM in order to measure the resistance between the terminal A of the LH backup lamp and a known good ground. Does the resistance measure less than the specified value? | 5 ohms | Go to Step 9 | Go to Step 8
8 |

1. Locate an open or high resistance in CKT F1.
2. Repair the open or high resistance in CKT F1.

Did you complete the repair?

--

Go to Step 10

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9 | Replace the RH or LH backup lamp. Refer to Rear License Lamp Replacement in Lighting Systems. Did you complete the repair? | -- | Go to Step 10 | --
10 |

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

Does the RH and LH backup lamps operate properly?

--

Go to Backup Lamp System Check

Go to Step 1