Pinpoint Test D: The Puddle Lamp(s) Are Inoperative

Interior Lighting

Pinpoint Test D: The Puddle Lamp(s) Are Inoperative

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

Normal Operation

Power is supplied to the puddle lamps through the Smart Junction Box (SJB) fuse 10 (15A). Based on the input status, the SJB supplies voltage to the puddle lamps. The puddle lamps have separate ground circuits.





This pinpoint test is intended to diagnose the following:

- Fuse
- Wiring, terminals or connectors
- Exterior mirror


PINPOINT TEST D: THE PUDDLE LAMP(S) ARE 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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D1 CHECK THE PUDDLE LAMP OPERATION

- Ignition OFF.
- Operate the instrument panel dimmer switch to the DOME LAMP position.
- Are both the puddle lamps inoperative?

Yes
VERIFY the SJB fuse 10 (15A) is OK. If OK, GO to D2.

If not OK, Refer to the Wiring Diagrams to identify the possible causes of the circuit short. Diagrams By Number

After the repair: if no DTCs are present, TEST the system for normal operation.

If DTC B106E is present, CLEAR the DTCs and REPEAT the self-test (required to enable the puddle lamp output driver if DTC B106E is present). TEST the system for normal operation.

If DTC B106F is present, INSTALL a new SJB. REFER to Multifunction Electronic Modules Service and Repair. TEST the system for normal operation.

No
GO to D3.

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D2 BYPASS THE SJB

- Operate the instrument panel dimmer switch out of the DOME LAMP position.
- Disconnect: SJB C2280c .
- NOTE: If the jumper wire fails, Refer to the Wiring Diagrams to identify the possible causes of the circuit short. After the repair: If no DTCs are present, test the system for normal operation. If DTC B106E is present, clear the DTCs and repeat the self-test (required to enable the courtesy lamp output driver if DTC B106E is present). Test the system for normal operation. If DTC B106F is present, install a new SJB. Refer to Multifunction Electronic Modules Service and Repair. Test the system for normal operation.
- Connect a fused jumper wire between the SJB C2280c-12, circuit CLN25 (VT), harness side and battery positive. Diagrams By Number




- Do the puddle lamps illuminate?

Yes
REMOVE the jumper wire. GO to D3.

No
REMOVE the jumper wire. REPAIR circuit CLN25 (VT) for an open. CLEAR the DTCs. REPEAT the self-test.

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D3 CHECK FOR VOLTAGE TO THE EXTERIOR MIRROR

- Operate the instrument panel dimmer switch out of the DOME LAMP position.
- Disconnect: Suspect Exterior Mirror .
- Operate the instrument panel dimmer switch to the DOME LAMP position.
- For Fusion/Milan, measure the voltage between the LH exterior mirror C517-4, circuit CLN25 (VT), harness side and ground; or between the RH exterior mirror C625-4, circuit CLN25 (VT), harness side and ground.




- For MKZ, measure the voltage between the LH exterior mirror C522-5, circuit CLN25 (VT), harness side and ground; or between the RH exterior mirror C626-5, circuit CLN25 (VT), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to D4.

No
REPAIR circuit CLN25 (VT) for an open. TEST the system for normal operation.

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D4 CHECK FOR VOLTAGE TO THE EXTERIOR MIRROR USING THE CONNECTOR GROUND

- For Fusion/Milan, measure the voltage between the LH exterior mirror C517-4, circuit CLN25 (VT), harness side and the LH exterior mirror C517-6, circuit GD126 (BK/WH), harness side; or between the RH exterior mirror C625-4, circuit CLN25 (VT), harness side and the RH exterior mirror C625-6, circuit GD139 (BK/YE), harness side.




- For MKZ, measure the voltage between the LH exterior mirror C522-5, circuit CLN25 (VT), harness side and LH exterior mirror C522-7, circuit GD126 (BK/WH), harness side; or between the RH exterior mirror C626-5, circuit CLN25 (VT), harness side and the RH exterior mirror C626-7, circuit GD139 (BK/YE), harness side.




- Is the voltage greater than 10 volts?

Yes
INSTALL a new exterior mirror in question. REFER to Rear View Mirrors Exterior Mirror. TEST the system for normal operation.

No
REPAIR the ground circuit in question for an open. TEST the system for normal operation.

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