Member Credit: DennisMik
This mod provides power all the time, with doors open or closed. I have this irritating habit of forgetting to close the rear windows and I didn’t like having to put the key in the ignition and turn it on in order to operate the power windows. So I decided to undo years of governmental nanny state-ism and have the windows work the way I want them to, not the way some bureaucrat wants them to.
Turns out this is an easy mod to do. You don’t have to take anything apart if you don’t want to. I did in order to get better photos. In stock form, Nissan uses a relay to supply the power to the window motors. This relay is energized when the ignition switch is in the “ON” position. So all you need to do is to remove the relay and add a jumper in the relay socket.
The Power Window Relay is located on the right side of the in-dash fuse panel. Remove the access cover to the fuses and you will see the blue Power Window relay on the right side. Look on the lower corner of the relay and you see the locking tab that you must push in on in order to remove the relay.
With the lower dash panel removed (you don’t need to do this), you can see that there is all kinds of room. FYI- the black thing to the right of the relay is the turn signal/hazard flasher unit.
Power Window relay removed.
You need to make a jumper wire. You want to use at least 14 gauge wire because this wire will carry a higher amount of amperage that most other wires in the car. 12 gauge wire is what Nissan has in the wire harness and if you intend to operate all the windows simultaneously, then you better use 12 gauge wire for this jumper. And if you do use 12 gauge wire, make sure the spade connectors can accept that size wire. I cut a piece of wire to be 1 1/4 inch long. I stripped 3/16 of an inch of insulation off of each end and soldered a 1/4 inch wide male spade lug connector onto each end.
Bend the jumper into a U shape and plug into the lower half of the relay socket.