Edit: The Blue wire is the brake signal from the Brake switch to the Tow Pro. You need this signal to the brake controller. This is why you tap into the wire. Here's the factory wiring diagram for this Customer Access Plug. See attached.Yes, the Blue wire also goes to the Bronco's computer, so you don't want to cut it. You don't need to activate the plug, it's ready to go. The Tow Pro is what gives you the brake signal depending on the G force so you don't need Fore Scan to activate it.
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