Pinpoint Test H: An Individual Demand Lamp Is Inoperative

Interior Lighting

Pinpoint Tests

Pinpoint Test H: An Individual Demand Lamp Is Inoperative

Refer to Wiring Diagram Set 89 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Interior Lamps for schematic and connector information. Diagrams By Number

Normal Operation

When the battery saver relay is energized, voltage is supplied to the demand lamps through circuit CLN09 (YE/GN). The demand lamps are provided ground through circuit GD182 (BK/GY).

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Sun visor
- Interior lamp



PINPOINT TEST H: AN INDIVIDUAL DEMAND 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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H1 CHECK FOR VOLTAGE TO THE INOPERATIVE LAMP


- Disconnect: Inoperative Demand Lamp .
- Ignition ON.
- Measure the voltage between the inoperative demand lamp, harness side and ground as follows:





- Is the voltage greater than 10 volts?

Yes
GO to H2.

No
REPAIR circuit CLN09 (YE/GN) for an open. TEST the system for normal operation.

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H2 CHECK FOR VOLTAGE TO THE INOPERATIVE LAMP USING THE CONNECTOR GROUND


- Measure the voltage between the inoperative demand lamp connector, harness side as follows:





- Is the voltage greater than 10 volts?

Yes
INSTALL a new interior lamp in question. 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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