n2audio 5,000+ posts
OPTIDRIVEN
You would have to be utterly ignorant about anything related to auto electric systems to make a statement like that.The service dept at the local Toyota dealership said the increased current might damage the vehicle electronics.
Current is provided on demand by the electrical accessories -- it is not a "force-feed" situation.
The big 3 simply reduces the resistance between components in the electrical system by increasing the cross section of the power and ground wires.
Less resistance means a little less voltage drop and slightly more efficient flow of current.
Hopefully that dealership knows more about their cars' engines and transmissions than they do the fundamentals of their charging systems.