The home park microswitch may have been damaged and is not shutting off the motor in the home/park position. On my 2009 the red wire on the wiper motor gets grounded in the home/park position (0 VDC) which tells the CPU to de-energize the Front wiper power relay.
The front wiper relay could also have failed in the ON position causing the problem.
Frank 2009 Versa S Sedan MT-6 with 51500 miles
The front wiper relay could also have failed in the ON position causing the problem.
Frank 2009 Versa S Sedan MT-6 with 51500 miles