(07 coupe MT) so im looking to diagnose and fix my rear defogger and im having trouble looking for what i need to find. My haynes manual doesnt come with a wiring diagram and i havent been able to find anything online. The dash light does come on, ive checked all the fuses under the dash, behind the battery and have heard the click of the rear relay, tested a new relay and nothing. Ive also tested the wiring at the window and get nothing on my tester. Ive pulled back the plastic trim to expose the wiring along the glass to maybe see something, but without a diag im not sure what to look for. Some advice or a diagram would be radical

These connector run from the left of the dash strait back

The wiring along the left side of the glass

The bs on the right, this is the only connector i saw

 

You can find the wiring schematics in the factory service manual (FSM) which is available to download for free at Nicoclub.com. The table of contents is fwd.pdf which should get you started.

 

Good luck with that. Nissan’s wiring diagrams suck asś!!

 

Yeah there is a learning curve to them. The information is there though. If it helps the OP the defogger description and troubleshooting steps are in gw.pdf. Besides the obvious suspects the IPDM and BCM are also involved in the rear defogger. I already knew the IPDM would be, because after mine got soaked driving through a massive puddle my defogger button was causing the horn to turn on.

 

At least the DE engine has actual one-line schematics for everything. I can't stand the newer style of layout they switched to for the HR engine, constantly flipping back and forth between whatever section the repair is located in and section PG - Power/Grounding to actually see the schematic.