Fusion FWD V6-3.0L (2009)
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Is the voltage greater than 10 volts?
Yes
GO to K3.
No
For Fusion, GO to K4.
For Milan or MKZ, REPAIR the circuit CLS17 (YE/GY) for an open. TEST the system for normal operation.
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K3 CHECK CIRCUIT GD171 (BK/GY) FOR AN OPEN (HIGH MOUNTED STOPLAMP)
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Disconnect: Negative Battery Cable.
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Measure the resistance between the high mounted stoplamp C475-2 (parcel shelf) or C4111-3 (spoiler), circuit GD171 (BK/GY), harness side and
ground.
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Is the resistance less than 5 ohms?
Yes
INSTALL a new high mounted stoplamp. REFER to High Mounted Stoplamp See: Center Mounted Brake Lamp/Service and Repair. TEST the system
for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
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K4 CHECK CIRCUIT CLS17 (YE/GY) FOR AN OPEN (HIGH MOUNTED STOPLAMP)
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Disconnect: SJB C2280e.
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Measure the resistance between the high mounted stoplamp C475-1 (parcel shelf) or C4111-1 (spoiler), circuit CLS17 (YE/GY), harness side and
the SJB C2280e-26, circuit CLS17 (YE/GY), harness side.
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Is the resistance less than 5 ohms?
Yes