Mark LT 4WD V8-5.4L VIN 5 (2006)
V14 Continued
Normal Operation
Circuit 14 (BN) supplies voltage to the exterior lamps and 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 to the
trailer tow connector through circuit 962 (BN/WH). Circuit 140 (BK/PK) supplies voltage to the trailer tow connector for the trailer to reversing
lamps. Circuits 52 (YE) (LH stop/turn) and 64 (DG) (RH stop/turn) are spliced to circuits 9 (LG/OG) and 5 (OG/LB), respectively within the CJB.
Ground is supplied to the trailer through circuit 206 (WH).
Possible Causes
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Fuse
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Circuit 14 (BN) open
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Circuit 52 (YE) open
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Circuit 64 (DG) open
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Circuit 140 (BK/PK) open
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Circuit 206 (WH) open
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Circuit 962 (BN/WH) open
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Trailer tow parking lamp relay
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CJB
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Trailer
Test W: The Trailer Lamps Are On Continuously
PINPOINT TEST W: THE TRAILER LAMPS ARE ON CONTINUOUSLY
W1-W2