2008 ford focus no start. neutral safety switch location?

Ignition starter switch ???? It's Just a ignition switch ! If a problem with PATS - anti-theft system , the pcm will not supply a ground to the control side of the starter relay . Starter relay located in the central junction box , inside the vehicle fuse/relay box. Do you know what a relay is an how it works ? How to test electrical circuit's with a DMM - digital multi-meter ? Do you know what a wiring diagram is ? How to use one for testing electrical circuit's .
Free wiring diagrams here http://www.bbbind.com/free_tsb.html
Enter the vehicle info. year , make , model an engine size . Under system click on engine ,then under subsystem click on starting . Click the search button then the blue link .Do you have a manual or automatic transmission ? Also won't start if has a bad park neutral safety switch . Try putting into neutral an see if it will start then .
Testing for B+ voltage at pins # 30 & 85 . If you pull the relay an look at the bottom you will see four set's of numbers 30 & 87 ,30 is B+ voltage an 30 goes to the S terminal on the starter solenoid . 85 & 86 is control side of the relay ,one should have B+ voltage an the other is connected to the PCM . When the PCM supply's a ground the relay is energized closing the contacts inside sending battery voltage to the starter solenoid .
Are you confused yet ? Looking at the wiring will show what i just stated . Video's on youtube on testing relay's an their circuit's . Good luck .

Jeanette, break switch is above brake pedal arm, safety neutral switch is on transmission, clutch pedal safety switch above clutch pedal arm. Links below have pics.
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if it starts if you bypass the relay then replace the relay as it is faulty

I had the same problem with an old car. Was a defective battery, one cell was dead. Replaced battery, all was fine.

It could be the starter has a dead spot,the battery voltage is weak,the ignition switch itself,the antitheft passkey or the neutral safety switch..it could also be a bad brake switch.The shift /start interlock is connected to the brake switch...
troubleshooting..... 1) put a test light on the small wire on the starter and see if it lights when attempting to start.if it has 12v or the test light is bright,,but will not crank,tap the starter gently with a plastic hammer,if it cranks the starter is bad.2) make sure the security light is going out.If not it is not reading the passkey and the ignition is faulty.3)when it does not start,jumper with a good battery and see if it starts if it does the battery voltage is low.4) make sure the brake lights go on with every application of the brake pedal.5)try to start in neutral instead of park when the failure occurs,if it does...the neutral safety switch is no good.
best of luck

Make sure battery has a full charge and battery connections all good.
At the starter motor, two voltage circuits. One comes from the battery, hot all the time. The other circuit goes hot with key in the crank position. The starter motor grounds through the engine block. You could use a test lite to check voltage at starter motor. There could be safety issues testing at starter motor, make sure tranny is in park or neutral and functional parking brake is set. If automatic tranny there is an inhibit switch, I usually call it a neutral switch. There could be other issues?

I had the same problem a month ago. my van would not start at all. I replaced the starter and ignition switch and still does the same thing, but when I replaced the neutral safety switch,it has been working ever since. Try replacing the neutral safety switch. it's located underneatht the battery. I paid almost $70 dollars from the dealer.

CHECK VOLTAGE AT STARTER BIG WIRE COMES FROM BATTERY, SMALL WIRE FROM IGNITION SWITCH , WITH TEST LIGHT CHECK VOLTAGE AT SMALL WIRE WHILE SOME ONE TURNS KEY TO START POS. IF THERE IS VOLTAGE STARTER NO GOOD. IF NO VOLTAGE CHECK IGNITION SWITCH AND SAFETY NEUTRAL SWITCH.

Voltage drop testing the starter electrical circuit would be a good first step , ruling out the cable's connections an ground !
Starter Voltage Drop If this doesn't find a problem ,then check the control side . Ignition switch , when it won't start check for Battery voltage at the connection at the starter solenoid "S" terminal .
How to voltage drop test starter motor circuit

Good day;
Have you have this problem before? If you had the battery change a month ago the first place that I would look at is to make sure that your battery cables are on proper. I would remove the cables from the battery and put them back on and make sure that they are nice and tight. Let me know how you make out with this.

Cheers.