2004 Passat has an electrical plug on the Battery (positive) cable (see pictures). I think in a rush in which I had to pull the battery a few months ago, I didn't catch whether it was connected or not. I've looked for the female plug connection within the radius of the plug's cable, but cannot find anything it might connect to. Coincidentally, I'm having heat problems with Supply Voltage (214) codes as well as Footwell Defrost Flap Servo (25b) and (4F8) codes. Any comments appreciated.
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