Nice job, I'm doing something similar for my 1995 HSE Range Rover.
I'm running GPS navigation, mp3 etc off a laptop with the charger powered by an inverter (300w cont, 1000w peak). I have a TM-868 touch screen which needs 12 volts. I have an AC adaptor for it which provides a regulated 12 volt supply, but I don't have the cigarette lighter adaptor for it.
Can anybody tell me what voltage the cigarette lighter adaptor for this screen provides when the engine is running? Does it regulate it back to 12 volts or do these screens run OK on 14.2 volts?
Any suggestions where I can get the proper adaptor for the tm-868
Thanks heaps
Greg



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