Why does red cable on passat battery go to negative terminal instead of positive like all other cars?
Since the red cable on our Passat is wired to the negative side of the battery, we inadvertently crossed the booster cables when attempting to jump a dead battery. The battery was dead anyway, so no big deal, and I had a full warranty to replace the battery, but after crossing the cables, car wouldn't hold a charge so I had to pull battery out to go get my replacement. When initially starting after replacing the battery, all was fine, and my wife drove it to work the next day without issue. But on the way home, the system went haywire and lost all power. At dealer now, but this seems like a VW problem they may try & charge me a bunch for. Was curious what the experts on here think happened and if it is the fault of the design. Thanks.
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