Mark LT 2WD V8-5.4L (2008)
Z6-Z7
Tests AA: The Trailer Lamps Are Inoperative - Parking
PINPOINT TEST AA: THE TRAILER LAMPS ARE INOPERATIVE - PARKING
Normal Operation
When the vehicle parking lamps are on, circuit 14 (BN) supplies voltage to the coil side of the trailer tow parking lamp relay. Ground is supplied to
the trailer tow parking lamp relay through the central junction box (CJB). When the trailer tow parking lamp relay is energized, voltage is routed from
the CJB fuse 10 (20A) to the trailer tow connector through circuit 962 (BN/WH).
This pinpoint test is intended to diagnose the following:
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Fuse
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Wiring, terminals or connectors
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Trailer tow parking lamp relay
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Trailer tow connector
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CJB
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Trailer