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Battery Maintainer

Electrical and Electronic

Vehicle Information: Year: 2001; Engine (type, size, modifications): 3.2; Total Mileage: 13,400; Transmission: Manual;

My question pertains to the Porsche factory battery maintainer:The red LED on the unit itself is not generally lit when the maintainer is connected to my car (via the cigarette lighter recepticle) and plugged in. When there is a draw on the electrical system (for example if I lift up on one of the door handles and the window lowers slightly) the LED lights up. Then after a few minutes, it goes out.Should the LED be lit all of the time? Please describe the proper function of this.Thanks.

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