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Old 05-22-2022, 10:53 PM   #8
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I have not seen a trailer wiring set up that relies on the trailer ball to provide continuity for the ground.

In my experience there is a white wire on the trailer side of the connector that gets attached to the trailer frame.

The wiring connector on the vehicle side has a wire that goes to the vehicle ground.

When the two connectors are joined the ground has continuity.
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