I really don't think the wire length will make a difference. The increase in wire size mentioned was just to make sure there wouldn't be a problem. Just make sure the added wire is not smaller.

Just for an example the resistance of 14 gauge wire is 2.525 ohm per 1000 feet. I think that comes out to be .002525 ohm per foot. 16 gauge would be .004016 ohm per foot. Adding 10 feet of 16 gauge wire would only increase the resistance .04016 ohm. In automotive systems, that is nothing.

Paul

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84 500 SEL (307,xxx miles)