On 24V vehicles what is the output on the Radio Plug? 12V or 24V? Surely Toy must have provided 12V there??!! Can one connect a std Radio, bought at any HiFi shop, to 24V or is there a max voltage they can take?! What would be the best solution to get 12V inside vehicle for other accessories?? What should be the output reading of a 24V to 12V Converter? On the 74 it is 15.5V. Is that correct??