Where is the neutral safety switch located on a 06 infinity g35 manual transmission

There is no relay involved in the starter circuit of this vehicle . The micro switch you are talking about at the shifter has nothing to do with the starting circuiIt either . If you have a automatic transmission There is on the transmission the park neutral safety switch . Won't allow the vehicle to start unless the transmission is in park or neutral . Ford calls the switch manual lever position switch . Try moving the shift lever to netual to see if it starts .

First we need to make sure that its the neutral safety switch how did you come about that conclusion? Try this next time it will not start shift the gear into neutral and try to start it again if it starts every time you shift to neutral I would say yes start with your neutral safety switch. Your neutral safety switch is incorporated with your transmission range sensor located on the transmission follow the transmission linkage to the transmission there you should find the neutral safety switch usually black in color made of plastic with a wire harness connected to it you could get someone to shift it for you while you look to make sure you are looking at the right part.

Test/Service/Replace

The circuit on newer cars with automatic transmissions has a neutral safety, or neutral start switch installed between the ignition switch and the starter. The ignition switch cannot operate the starter motor unless the transmission is in park or neutral.
Late model vehicles with manual transmissions have a starter/clutch interlock switch that requires the clutch to be depressed to the floor.
Neutral Safety Switch
Normal operations of a neutral safety switch provides a quick check for the adjustment of the gear selector linkage.

• To do this, move the selector slowly until it clicks into the PARK position.
• Turn the ignition key to the START position.
• If the starter operates, the PARK position is correct.
• After checking the PARK position, move the lever slowly toward the NEUTRAL position until the lever drops at the end of the NEUTRAL stop in the selector gate.
• If the starter also operates at this point, the gearshift linkage is properly adjusted.
• This quick test also tests the adjustment of the neutral safety switch.
• If the engine does not start in either or both of these positions, the neutral safety switch or the gear selector linkage needs adjustment or repair.

CAUTION
Since you must work under the vehicle to adjust most shift linkages make sure you properly raise and support the vehicle before working under it. Also, wear safety glasses or goggles while working under the vehicle.
A voltmeter can be used to check the switch for voltage when the ignition key is turned to the START position with the shift lever in PARK or NEUTRAL. If there is no voltage, the switch should be adjusted or replaced.

If you swapped out the auto for a manual trans the car might have a neutral start safety switch preventing the starter from engaging. This would not be something you would have on a manual transmission. Instead the manual would have the Clutch Safety switch which will only allow the starter to engage if the clutch is pressed in. On an automatic it won't allow the engine to turn over unless it's in Park or Neutral. I would locate the plug for the neutral start safety switch for the old automatic transmission and bypass it.

Below are 2 pictures for you. Both are pretty much in the same spot it just depends on if you have a 3 or 4 speed transmission. Now I'm not sure of the "clicking" sound that you are talking about but I just want to mention that you do have a starter relay. You may be hearing that "Click" but your starter could be bad. Even your starter could be making the "clicking" noise. I say this because it sounds like failure in that area and not the neutral safety switch. If that were bad you would hear nothing as if you were trying to start it when it was in gear...you hear nothing. A quick test you can is to have someone turn the key to try and start the engine. While they are doing that put your finger on the starter relay (see picture below of location). if you feel it engauge or "click" that means you're getting power to the starting system and it's not your neutral safety switch. You could go one step farther and if the relay is clicking go down to the starter. Again while someone turns the key to start using a test light check to see if you are geting power to one of the smaller wires (not sure of the color but it will be on the solenoid) and if you are geting power while the key is turned and trying to start buy no power when they let off the key then you most likely have a bad starter. Or a wiring problem. I just wanted to mention this so you are just not changing parts for nothing. Hope this helps...

Since you have power to your accessories, here are a few more things to consider:
1: Automatic transmission not in park or the neutral safety switch is faulty
2: On manual transmissions clutch pedal not depressed or or clutch start switch failure
3: Broken or loose wires in the starting circuit. Inspect all wires and connectors at the battery, starter solenoid, and ignition switch
4: Starter motor pinion jammed in flywheel ring gear. Manual transmission. place transmission in gear and rock the vehicle to manually turn the engine. Remove starter and inspect pinion and flywheel

sounds like the neutral safety switch. Hope this helps tim

The only click I would care about is the starter solenoid.
If it is not clicking, then the ignition switch or neutral safety switch is not letting anything get to the starter at all.
Easy to check by simply putting a test light at the small wire that plugs onto the starter solenoid. It should get power only in the start position of the ignition switch.
If it does not, then you have to back track and decide if it is the ignition switch or neutral safety switch (usually on the side of the transmission).
Try starting in neutral instead of park?

when it wont start, turn your headlights on, see if they work if they dont, find out why. When it wont start, take a wire from the positive battery terminal and touch it to the small post on the starter solenoid, it should crank. If it now cranks, theres a problem between the ign switch and the starter solenoid.

Sounds like the safety neutral switch may be defective. If it gets out of adjustment or fails completely, the car will not start. Sorry, I would have to look at it to know, but some are located on the transmission and some are at the gear shift. Have the switch checked to insure the right voltage is getting to it. If the switch thinks it's in a gear other than park or neutral it will not start or turn over.