F 350 4WD Super Duty V10-6.8L VIN Y (2006)
Y3-Y5
Normal Operation
The trailer tow LH turn relay coil receives voltage through circuit 9 (LG/OG) when the vehicle LH rear lamp is illuminated. The trailer tow LH turn
relay coil is grounded through circuit 57 (BK). The battery junction box (BJB) fuse 9 (20A) supplies voltage to the trailer tow LH turn relay through
circuit 1362 (DG/OG). When the trailer tow LH turn relay is energized, the voltage is routed to the trailer tow connector through circuit 52 (YE).
Possible Causes
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Fuse
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Circuit 9 (LG/OG) open
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Circuit 52 (YE) open
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Circuit 57 (BK) open