MKT FWD V6-3.7L (2010)
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Pinpoint Test AA: The Trailer Stop/Turn Lamp Is Inoperative
Trailer Lamps
Pinpoint Tests
Pinpoint Test AA: The Trailer Stop/Turn Lamp Is Inoperative
Refer to Wiring Diagram Set 11, Fuse and Relay Information for schematic and connector information. See: Diagrams/Electrical Diagrams/Diagrams By
Number
Refer to Wiring Diagram Set 95, Trailer/Camper Adapter for schematic and connector information. See: Diagrams/Electrical Diagrams/Diagrams By
Number
Normal Operation
The trailer tow LH stop/turn relay coil receives voltage when the vehicle LH rear stoplamp is illuminated. When the trailer tow LH stop/turn relay is
energized, the voltage is routed from the trailer tow LH stop/turn relay to the trailer tow connector.
The trailer tow RH stop/turn relay coil receives voltage when the vehicle RH rear stoplamp is illuminated. When the trailer tow RH stop/turn relay is
energized, the voltage is routed from the trailer tow RH stop/turn relay to the trailer tow connector.
This pinpoint test is intended to diagnose the following:
-
Fuse
-
Wiring, terminals or connectors
-
Trailer tow connector
-
Trailer tow stop/turn relay
-
Trailer
PINPOINT TEST AA: THE TRAILER STOP/TURN 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.
NOTE: Before beginning diagnostics, visually inspect the trailer tow connector mounted on the bumper for signs of corrosion or damage. Repair or
install a new trailer tow connector as required.
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AA1 VERIFY THE TRAILER LAMP OPERATION
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Ignition OFF.
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Determine if both trailer stop/turn lamps are inoperative.
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Are both trailer stop/turn lamps inoperative?
Yes
VERIFY the BJB fuse 45 (20A) is OK. If OK, REPAIR circuit CBB45 (YE) for an open. TEST the system for normal operation. If not OK, REFER to
the Wiring Diagrams to identify the possible causes of the circuit short. See: Diagrams/Electrical Diagrams/Diagrams By Number
No
For an inoperative LH trailer lamp, GO to AA2.
For an inoperative RH trailer lamp, GO to AA8.
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