QX56 V8-5.6L (VK56DE) (2004)
When the ignition switch is in the ON or START position, power is supplied
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from IPDM E/R terminal 16
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to trailer tow relay 2 terminal 1.
When energized, the trailer tow relay 2 supplies power
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from trailer tow relay 2 terminals 5 and 7
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to trailer tow 7-pin connector terminal 5.