Rear defog not working power to switch is on back grid is good

If the rear defogger on your 2006 Nissan Pathfinder is not working, it could be caused by several issues. Here are a few things you can check:

1. Fuse: The first thing to check is the fuse for the rear defogger. The fuse box is usually located under the hood or in the passenger compartment. Check the owner's manual for the location of the fuse for the rear defogger.
2. Switch: The switch for the rear defogger may be malfunctioning. Check to see if the switch is functioning properly by turning it on and off.
3. Wiring: The wiring for the rear defogger may be damaged or corroded. Check for any visible damage or corrosion to the wiring.
4. Defrost grid: The defrost grid on the rear window may be clogged or damaged. Check for any visible damage or debris on the grid.
5. Relay: The relay for the rear defogger may be malfunctioning. Check to see if the relay is functioning properly.

It's important to keep in mind that these are just a few possible causes and that there may be other issues that are preventing the rear defogger from working. If you're unable to diagnose the issue, it's best to take your vehicle to a qualified mechanic for further diagnosis.
It's also important to note that some of these steps require a certain level of mechanical knowledge and experience. If you're not comfortable with checking these items, it's best to consult a professional mechanic if i was able to help my cashapp $ralphpapi thank you have a blessing day

Fuse box rear , fuse #23 30 amp ! Do you know where this is located ? There is also a relay for the Rear window defogger , located in the same rear fuse box .
Fuse Block - Rear
Left side of the luggage compartment, behind the left rear wheel well . But you really need to know how it works , you can check fuse an relay .
Rear Window Defogger Operation
Battery positive voltage is supplied through the BATT 1 fuse in the underhood fuse block to the rear defog relay switched input. When the rear defog switch button is pressed, the body control module (BCM) energizes the rear defog relay by providing a B+ to the control circuit of the rear defog relay. This allows battery positive voltage from the relay switched input through the switch contacts and out the relay switched output to the rear window defogger grid. The HVAC control module houses the rear defog switch and also illuminates the rear defog indicator on the switch button, upon this request. Ground for the rear window defogger grid is provided by G301 for the Sedan or G302 For the Extended Sedan.

I found this. Your heated mirror also works off that relay. You can do ohms test on the grid, if the grid is open, no continuity. The auto store should sell a product to paint over the open spot to restore continuity, if you can find the open spot.
Not trying to cause trouble, just killing time. Have a good day.

Did you check voltage and ground at rear defog connector, purple wire should be voltage, black wire is ground. Check to see what your missing, defog turned on. If you have good voltage and ground, then suspect a break in the defog grid. If you can locate the break, the auto store should have some stuff you can paint over the break to allow continuity for the grid.
Also, you should be able to check grid continuity, ohms test. If no continuity, something wrong with grid.
Here is partial diagram.

Switch, fuse or maybe the wiring to the window has come loose or off, happens alot, kits are available at local auto parts stores...
I hope that helps...

First check all fuses, second check for 12v power at the connector to th rear window, a test light or volt meter on dc voltage,if there is power use an ohm meter to check the window grid with the power connector disconnected.if open the connection is either open or bad. if there was no power at the connector check the power from switch all the way back to the window

What fuse ? BATT 3 40amp. under hood fuse box ? Did you check G403 ? Free wiring diagrams here http://www.bbbind.com/free-tsb
Enter vehicle info. year , make , model an engine . Under system click on body & accessories ,then under subsystem click on power windows . Click the search button then the blue link . The second diagram down is the defogger diagram . With a volt meter test for B+ voltage at relay pin # 30 .

Couple of things to check - first look for any scratches through lines, a couple of scratches will not let power run from side to side. The other is -> with a test light or voltage meter -> put (+)cable of meter/light to small electrical connector that attached to your window and (-) cable to a good ground (metal) light will come on/meter should read voltage there.

Yes there is a relay, but it is part of the hvac control head. There are two fuses in the system one is labled the hvac fuse it's a 10amp and there is a RR defog 30amp fuse. Those supply power to the hvac control head. Control head supplys power to the rear defroster. There should be a purple wire in c3 terminal D on the back of the control head. See if that has power when you turn on the switch. If it dose not then there is not power out put to the rear defroster. If so then the problem lies further down the line.
Good luck

check for power at the element on the window.