There's nothing wrong with this hitch wiring kit. Disconnect the vehicle trailer harness connector located behind the rear driver's side wheel well, connect the T-One connector, route the trailer connector wires to the tow bar and connect the 2 relays to the fuse box as shown. I have to give Buick an A for this perfectly designed hitch plug. The T-One harness works properly and the relays make no noise when the turn signals are on.
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