beside the USB ID shown 1.69V without usb, but when plusgged with usb it change to 0.22, 1,30, 1,2 ( with 3 other cables). the cables works fine on other nuvi 1100. By the way sometimes when this nuvi 255w plugged with usb i can enter usb storgae mode.. but it to short and most of the times it wont go to usb mode.
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