did you follow the instructions for the connects 2 single wire connection ? you just use the one input wire on that and the adapter does the rest. if you buy another then you could wire the unit to ignition on only , that way you would not incur a possible spike, which until you have tried to resolve by other means seems highly likely. they are not that dear, and i bought an extra spare for just that reason . fortunately mine has been ok up to now. touch activate any screen or button , ignition on only .
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