I just installed a Switch-Pros 9100, and need to connect the ignition sense wire of the SP9100 to a circuit that is switched with ignition. The DEFOG fuse in the dash panel would be ideal for a fuse tap connection, but my DEFOG fuse appears to be providing constant 12V power. The SP9100 control pad stays lit up regardless of whether the truck is running or shut off, and the IGN LED on the control module remains lit up all the time. Is the DEFOG fuse supposed to be 12V constant?