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2008 550i battery wire running from positive cable to negative cable?
Hello guys. I purchased a 2008 550i from someone who let it sit for several months. I purchased a new battery and installed today and found a wire in that black corrugated sheathing running from the pos terminal that should plug into the negative terminal. I didn't know where it plugged in until just seeing a photo online. Does anyone know what this wire is for? I'm getting no crank,no click etc. All lights power up but nothing and hoping this wire might be starter? Thanks in advance for the help.:
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