Quote:
Originally Posted by Kanoe
I wonder what is up with that. My Ultraguage measures within .1 or .2 of battery voltage.
You could put your DVM on the 12V pin of the OBD2 port to see if it is a voltage drop in your wiring or if it is a misreporting by the device you are using. What are you using on the OBD2 anyhow?
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It could very well be the bluetooth reader. It's never been that high (13.1V is the highest I've ever seen in 5 years of having it), it's the BAFX cheapo reader off Amazon so I'm not expecting the world from it. However, it does seem to rise and drop in proportion to the battery voltage accurately.
I have no low voltage issues anywhere in the cabin so I haven't really worried about it much. Headlights don't dim or anything like that so I think it's probably just the reader. I did order a cigarette lighter voltage reader though which I'm interested to see if that's more accurate:
https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1
