On my 91 aerostar the passenger side window will not work via the driver side switch , the rt side will work usiing the rt side switch, I changed the dual switch on driver side and it still wont operate the rt window,, when I push the drivers side dual switch to operate the rt side windowin the up or down mode I can see the batt guage discharge. When i move the left side window up and down there is less batt drain on guage but it works good..Any idea what to check next , Thanks