Pinpoint Test G: All The Demand Lamps Are Inoperative

Interior Lighting

Pinpoint Tests

Pinpoint Test G: All The Demand Lamps Are 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

The Smart Junction Box (SJB) energizes the battery saver relay based on inputs from the ignition key position, the door ajar, liftgate ajar and liftgate glass ajar switches, the Remote Keyless Entry (RKE) transmitter, the keyless entry keypad, and the instrument panel dimmer switch. 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:

- Fuse
- Wiring, terminals or connectors
- SJB



PINPOINT TEST G: ALL THE DEMAND LAMPS ARE INOPERATIVE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTE: Make sure the courtesy lamps operate before continuing diagnostics.

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G1 CHECK THE OPERATION OF ALL THE DEMAND LAMPS


- Ignition OFF.
- Operate and observe each demand lamp (map lamps and vanity lamps).
- Are all the demand lamps inoperative?

Yes
VERIFY the SJB fuse 25 (10A) is OK. If OK, GO to G2. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short.

No
Go To Pinpoint Test H. Pinpoint Test H: An Individual Demand Lamp Is Inoperative

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G2 BYPASS THE SJB


- Disconnect: SJB C2280d.
- Connect a fused jumper wire between the SJB C2280d-21, circuit CLN09 (YE/GN), harness side and battery positive.




- Switch on a demand lamp.
- Does the demand lamp illuminate?

Yes
GO to G3.

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

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G3 CHECK FOR CORRECT SJB OPERATION


- Disconnect all the SJB connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new SJB. TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

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