Pinpoint Test W: The Individual Reversing Lamp Is Inoperative
Reversing Lamps
Pinpoint Tests
Pinpoint Test W: The Individual Reversing Lamp Is Inoperative
Refer to Wiring Diagram Set 93 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Reversing Lamps for schematic and connector information. Diagrams By Number
Normal Operation
When the reversing lamps relay is energized, voltage is routed to the reversing lamps through circuit CBB07 (GN/BU). The reversing lamps are provided ground through circuit GD182 (BK/GY).
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Bulb holder
PINPOINT TEST W: THE INDIVIDUAL REVERSING LAMP IS INOPERATIVE
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
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W1 CHECK FOR VOLTAGE TO THE REVERSING LAMP
- Ignition OFF.
- Disconnect: Inoperative Reversing Lamp.
- Apply the parking brake.
- Ignition ON.
- Select REVERSE.
- Measure the voltage between the LH reversing lamp C451-2, circuit CBB07 (BU/WH), harness side and ground; or between the RH reversing lamp C461-2, circuit CBB07 (BU/WH), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to W2.
No
REPAIR circuit CBB07 (BU/WH) for an open. TEST the system for normal operation.
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W2 CHECK FOR VOLTAGE TO THE REVERSING LAMP USING THE CONNECTOR GROUND
- Measure the voltage between the LH reversing lamp C451-2, circuit CBB07 (BU/WH), harness side and the LH reversing lamp C451-1, circuit GD182 (BK/GY), harness side; or between the RH reversing lamp C461-2, circuit CBB07 (BU/WH), harness side and the RH reversing lamp C461-1, circuit GD182 (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 GD182 (BK/GY) for an open. TEST the system for normal operation.
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