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I have an old Garmin Nuvi 200 and when I plug it into the built-in USB port in my truck, or a non-Garmin charger in the cigarette lighter, it gives me a screen indicating that it thinks its plugged into a computer and is awaiting a download.  That's all it will do.  If I plug in the factory charger it works fine but any other mini-USB cable seems to make it think its plugged into a computer.  I can get away with the factory charged but it sticks way out of the cigarette lighter and the cable is about 2 1/2 times longer then I need so that lays coiled on the center console around the cup holders and such.  I wanted to use a nice short coiled USB / mini-USB cable to keep things neat. 

Why won't these other cables work correctly?  Also, is there either a factory or aftermarket coiled cable that will work plugging into the trucks USB port or that other charger?  Is there some type of setting on the Nuvi that will prevent it from thinking its plugged into a computer?

(I know, I should get get a new one since this one's so old but it does what I want it to...usually).

Thanks!