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Went to the mechanic, and the voltage looked good at 14,4v +- when everything (car, airco, lights, radio) were on. Looks like my multimeter is busted. Need to buy a new 9v battery for my multimeter to test if that fixes the offset, or I'll try to calibrate my multimeter. Anyways, always test with another multimeter if in doubt.


Certainly plugs vary in their quality and ability to stay put. However, I am certain there are differences in the socket diameters as fitted to different makes of vehicles. My Honda is OK but my Fiat Ducato based campervan will not keep plugs in. The answer is a cylindrical metal sleeve adaptor. I have got one of these which came with some device I ...

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