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A WHOLE 1/4 inch !!! I bet most people couldn't even SEE that tiny difference. And even fewer would actually fret about it.
And my point IS that ALL HIDs are not automatically brighter than ALL halogens. There are various types and grades of each. What you got may...
Bad. VERY bad. You are probably on the verge of not starting with those readings. And yes, absolutely. I hope it reads over 13 in READY mode (ON).
A new map may not fix the "problem" that you noticed. I've owned about 6 different model GPSs in the past 10 years or so and they ALL did crazy...
Speaker wires usually don't carry enough current to cause burning smells even if they are dead-shorted. No doubt there is some kind of electrical...
If the 12 V battery has never been changed, you are about due. I would start there, whether it tests "good" or not.
Some will, some won't. I personally won't touch a vehicle that has been "screwed with" in any way except cosmetic.