I'd be very surprised if the circuit isn't fused...there are auxilliary fuses on the 4 corners of the fusebox and sometimes even outside of the box that handle these circuits. You really should find a wiring diagram and trace it out though.

On the bright side you used good solid diagnostic techniques to locate the problem and at least for now have made it so the car is driveable...that's good...now just figure out what you need to do to remedy it and you're set.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz