i was putting in a aftermarket double din in my car when i was finish installing it i went to see if it worked by putting on the key to accessory and when i did that i realized that the gear indicator wasnt showing that the car was in park so i decided to run through the gears to see if the rest would show up but they didnt it was blank so i went to start the car and when i tried that the car did not start it didnt even crank. what can be causing this ?

 

A disconnected or dead battery

Telcoman

 

i tested the battery its working good

 

What year is your sedan? Automatic? Are you talking about the gear indicator in the instrument cluster? Does that normally show the gear in accessory mode? (I'm asking because I don't know.) It's easy to blow a fuse or two while doing the double din conversion...

 

So was this problem ever solved? I know it’s been a while since this thread was created, but I am now having the same issue

 

What did you do just prior to the problem?
Have you tested your battery?
Have you checked all fuses with your multimeter
Have you looked in the FSM?

http://www.nicoclub.com/FSM/G35/Seda...5_Sedan/pg.pdf

Telcoman

 

I’ve check the battery. It’s working fine.i also change a couple of fuses.
when the key is in the “on” position, everything works fine (ie: AC; sunroof; radio; ) but when I try to turn it over I get nothing. No clicking, no noise. It just blanks out as if car isn’t in park or neutral

 

No crank is usually a failed starter, however there is a start relay in the IPDM that can fail as well. Troubleshoot both, there is also a PNP switch on the transmission and if your gear shift indicator isn't working either (like the problem in this OP thread) then it might have failed as well.

Describe "blanks out".

 

I attached a video to show what I meant by blanks out

 

Here it is

 

Dead battery, not enough current to engage the starter.

Either it's the battery or it's the cables. Disconnect everything, check both ends of EACH CABLE along with the entire length of the cable to make sure there's no corrosion or damage.

Also throw a charger on your battery, it's probably VERY low, doesn't matter that it's a new battery.

 

Even with a full battery it does the same thing. I even used a jump starter.
I also for got to mention that I also tried starting the car directly from the starter. (*i don’t know the exact term* but I basically connected a cable to the starter and the other end I tapped on the battery ) the engine cranked but wouldn’t turn over.

 

Did your new radio have a wire to connect it to your dash lights? Is it possible it's not compatible with the way these dashes are set up and shorting itself out? I'd try disconnecting that one wire before I did anything else. As regards starting make sure you didn't knock the switch loose on the shifter while the console top was off that detects whether its in park or neutral.

 

the car is completely stock.
And I went under the car to check if anything was loose and everything seemed in place and connected. Of course I’m not a mechanic nor do I know much about this type of thing so I could be looking in the wrong places

 

While you were under your car did you notice if the fiber board shroud was missing and was your vehicle ever involved in a flood or driven in water or heavy rain lately?