I have read what you are asking several times now and I simply do not understand what you are saying.
Does the signal light work, or does it not work? If it doesn't work and it isn't the bulb, it may be the connection itself. Clean the area where the bulb fits and use some light grit sandpaper to clear away any residue that may be there.
If you have a voltmeter, check to see if you have voltage at the light socket.
If no voltage, unless you know how to trace the wiring, I'd say you're headed to the dealership.
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