Can anyone tell me how to fix my cruise control in 2005 g35 coupe. My horn and stereo controls work, but the cruise control will not work at all. Can anyone help??

 

Grab the file called "acs.pdf" from here:
http://www.nicoclub.com/FSM/G35/Coupe/2005/
That should help you track down what's happening. Check all the fuses 1st. If your coupe is a manual, check the "cancel" switch on the clutch and / or brake pedals... (Easiest test is to pull the pedal towards you with your toe and try to engage the cruise - if it works then you know that pedal OR that switch needs adjusting).

 

It won't let me open the link on the pdf

 

Copy link, open new tab, paste

 

Still won't work :/ do you know where the fuse is for the cruise control?

 

Opps, sorry, the acs file I pointed you to above is exactly 2 pages long and simply refers you to the "ec.pdf", "engine control" file. There is more detailed info in that file about your cruise control referred to as ACSD or Automatic Speed Control Device (gotta love that). So that's the pdf you should get. Again, it should be here:
http://www.nicoclub.com/FSM/G35/Coupe/2005/

Wiring diagram starts on page 657 of that book. There are several fuses involved but I believe the cruise is controlled by our main black box, the ECM. If nothing else has failed on your car I would first look at those clutch and brake switches as the likely troublemakers. Are your brake lights working?