Yesterday my passenger side window stopped working and there was no prior problems. The previous owner said that the motor had been replaced so before diving into it I wanted to get some heads-up. Clearly its not in the fuse compartment on the lower left so that leaves the engine bay. If there is only one fuse for both then that means a new motor since the drivers side works fine. I'd rather know beforehand that I simply need to replace the motor rather than removing the trim covers only to find that there is only one fuse and its fine. I figure its in the fuse box next to the firewall that has the fan and ac relays but knowing the answer beforehand will save me a lot of time that I can devote to taking the door apart and changing the motor.

 

There are no fuses directly for the window motor.

 

Have you consulted the FSM?

https://nicoclub.com/FSM/G35/Coupe/2005/gw.pdf

Grab your multimeter

POWER WINDOW SYSTEM

Passenger Side Door POWER WINDOW SUB-SWITCH OPERATIONWINDOW UPWhen the power window sub-switch is pressed in the up positionPower is supplied
through power window sub-switch terminal 8.
to passenger side power window motor terminal 2Ground is supplied
to passenger side power window motor terminal 1
through power window sub-switch terminal 9.Then, the motor raises the window until the switch is released.WINDOW DOWNWhen the power window sub-switch is pressed in the down positionPower is supplied
through power window sub-switch terminal 9.
to passenger side power window motor terminal 1Ground is supplied
to passenger side power window motor terminal 2
through power window sub-switch terminal 8.Then, the motor lowers the window until the switch is released.POWER WINDOW MAIN SWITCH OPERATIONSignal is sent
though power window main switch terminal 12.
to power window sub-switch terminal 16The operation of power window after receiving the signal is as same as for operating the power window withsub-switch.POWER WINDOW SERIAL LINKPower window main switch, power window sub-switch and BCM transmit and receive the signal by power win-dow serial link.The under mentioned signal is transmitted from BCM to power window main switch.
Driver side door switch signal.
Keyless power window down signal.The under mentioned signal is transmitted from BCM to power window sub-switch.
Passenger side door switch signal.
Keyless power window down signal.The under mentioned signal is transmitted from power window main switch to power window sub-switch
Passenger side door window operation signal.
Power window control by key cylinder switch signal.
Power window lock signal.AUTO OPERATIONThe power window AUTO feature enables the driver to open or close the window without holding the windowswitch in the down or up position.POWER WINDOW LOCKThe power window lock is designed to lock operation of passenger side door window.When the lock position, power window lock signal is sent by using power window serial link from power win-dow main switch to power window sub-switch.Power window sub-switch by which the signal is received, prohibits the operation of passenger side powerwindow by power window sub-switch.

GW-18POWER WINDOW SYSTEMEdition: 2004 September2005 G35 CoupeSystem DescriptionAIS001WZPower is supplied at all time
through 50A fusible link (letter F , located in the fuse and fusible link box)
to BCM terminal 55
through 10A fuse [No. 18, located in the fuse block (J/B)]
to BCM terminal 42
through BCM terminal 54
to power window main switch terminal 1
to power window sub-switch terminal 10.With ignition switch in ON or START position, power is supplied
through 10A fuse [No. 1, located in the fuse block (J/B)]
to BCM terminal 38, and
through BCM terminal 53
to power window main switch terminal 10Ground supplied
to BCM terminal 52
through body grounds M30 and M66.
to power window main switch terminal 15
through body grounds M30 and M66.
to power window sub-switch terminal 11
through body grounds M30 and M66

Driver Side DoorWINDOW UPWhen the driver side window switch in the power window main switch is pressed in the up position, Power is supplied
through power window main switch terminal 8.
to driver side power window motor terminal 2Ground is supplied
to driver side power window motor terminal 1
through power window main switch terminal 11.Then, the motor raises the window until the switch is released.WINDOW DOWNWhen the driver side window switch in the power window main switch is pressed in the down positionPower is supplied
through power window main switch terminal 11.
to driver side power window motor terminal 1Ground is supplied
to driver side power window motor terminal 2
through power window main switch terminal 8.Then, the motor lowers the window until the switch is released

Telcoman

 

As dumb as it sounds, make sure the passenger window button isn't pushed in on the driver door master switches

 

Not dumb!

It is in the FSM operation and most likely described in the owners manual

".Power window sub-switch by which the signal is received, prohibits the operation of passenger side powerwindow by power window sub-switch."

 

Yeah....good luck with all that.