Pinpoint Test X: The Individual Reversing Lamp Is Inoperative
WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
- X1 CHECK FOR VOLTAGE TO THE REVERSING LAMP
- Ignition OFF.
- Disconnect: Inoperative Reversing Lamp.
- Apply the parking brake.
- Ignition ON.
- Select REVERSE.
- For Fusion, measure the voltage between the LH rear lamp C487-1, circuit CLS10 (GN/BN), harness side and ground, or between the RH rear lamp C488-1, circuit CLS10 (GN/BN), harness side and ground.
- For Milan or MKZ, measure the voltage between the LH rear lamp C451-1, circuit CLS10 (GN/BN), harness side and ground, or between the RH rear lamp C461-1, circuit CLS10 (GN/BN), harness side and ground.
- Is the voltage greater than 10 volts?
- Yes: GO to X2.
- No: REPAIR circuit CLS10 (GN/BN) for an open. TEST the system for normal operation.
- X2 CHECK FOR VOLTAGE TO THE REVERSING LAMP USING THE CONNECTOR GROUND
- For Fusion, measure the voltage between the LH rear lamp C487-1, circuit CLS10 (GN/BN), harness side and the LH rear lamp C487-2, circuit GD171 (BK/GY), harness side, or between the RH rear lamp C488-1, circuit CLS10 (GN/BN), harness side and the RH rear lamp C488-2, circuit GD171 (BK/GY), harness side.
- For Milan or MKZ, measure the voltage between the LH rear lamp C451-1, circuit CLS10 (GN/BN), harness side and the LH rear lamp C451-2, circuit GD171 (BK/GY), harness side, or between the RH rear lamp C461-1, circuit CLS10 (GN/BN), harness side and the RH rear lamp C461-2, circuit GD171 (BK/GY), harness side.
- Is the voltage greater than 10 volts?
- Yes: INSTALL a new bulb holder. TEST the system for normal operation.
- No: REPAIR circuit GD171 (BK/GY) for an open. TEST the system for normal operation.