My Chrysler 300 won't start. Problem is not battery or fuses. Not getting 12 volts to 5 amp fuse (fuse is good) for control voltage to starter relay. Applied 12 volts to fuse socket with ignition s

Check the stater fuse and relay

Check for 5 volt reference signal at the TPS - throttle position sensor , could have shorted sensor causing the problem . Do you know what a computer 5 volt ref. signal is ? Video's on youtube . Your engine computer controls the starter motor relay which turns on the starter . Free wiring diagram's here http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine . Under system click on engine ,then under subsystem click on starting . Click the search button then the blue link. Find the starter motor relay in the under hood fuse / relay box , pull it out an look at the bottom , where the pins are . You should see four set's of numbers , 30 , 87 & 85 , 86 . PIn's 30 & 87 are for the power feed to starter , pin 30 should have battery volt if tested with a voltmeter . If you jumped pins 30 & 87 with a piece of wire if the starter is good an battery cable an connections are good the starter would spin the engine over . Just so your not confused , jump where the relay plugs into the fuse box , not the pins of the relay .

5 volt reference

If the 5 volt reference is good , check power an ground circuits to the PCM - engine computer .

If that is good , suggest you take your vehicle to a qualified repair shop for more indepth testing .

or the Sentinel ????? What's this ??? SOLENOID on the starter ? Do you know how the starter circuit works ? Do you know what happens when you turn the key to the start position ? Turning the key to start sends a voltage signal to the PCM - engine computer , which will energize the starter relay which sends B+ voltage to the S terminal on the starter solenoid . Checking for a ignition switch voltage to the PCM can be done at the crank fuse 10 amp . located in the underhood fuse box. If B+ voltage is see there ,using a DVOM - digital volt ohm meter , the ignition switch is good . Moving on , find the the starter relay in the under hood fuse box. Pull it out of it's socket an look on the bottom of it , you will see four set's of numbers 30 ,87 & 85,86 . Taking a piece of wire (12 gage ) jump 30 to 87 where the relay plugs into the fuse box. If the battery cables are good an good connections at the battery , The starter if good will crank the engine (spin the engine ) If not ,could have battery cable problem . Need to do voltage drop testing .

Starter Voltage Drop

Is the SECURITY light lit on the instrument cluster ? car an padlock symbol . anti-theft system problem if it is .

Make sure battery has a full charge and battery connections all good. Check fusible links where applicable. Any component that doesn't work and is fuse protected, not only check the fuse, check the fuse circuit for voltage, use a test lite.
The wiring diagram is for starter circuit, you can see the fuses. Any testing for starter motor, make sure tranny is in park or neutral and parking brake is set. It is possible to jump crank relay to see if starter motor will crank, but, that doesn't mean it will start. Make sure vehicle can't move.

The ignition switch if what you say about your tests are accurate .
You need a point to start at test the 2 hot wires at the switch for B+they will be large likely yellow wires for 12 volts with the connector disconnected form the ignition switch .
If you have voltage the ign sw is bad if not work your way back to the fuse box because the battery voltage has to come through that box or fuse in that box to get to the switch to start the vehicle its a main power problem 1 of these wires will not have voltage .

Did you check power an grounds using voltage drop testing , did you check battery voltage an computer control at the starter motor relay in the under hood fuse / relay box ? Instead of guessing you need to learn how to use a DVOM - digital volt ohm meter an test ! The powertrain control module controls the starter motor operation ! Starter Voltage Drop VEHICLE RELAYS Operation Diagnosis ,If you pull the relay an jump pin's 30 & 87 the starter should crank ,test the circuit starter motor side ! Pins 85 & 86 are the control side ., Pin 85 or 86 forget which one has battery voltage with the key on . The one with out voltage is control from the engine computer ! Also if the anti theft system is active it wont start !

Multiple issues here??
Why did the motor quit??
Did you check the engine control fuse box for issues? It is next to the battery?
The is an imprinted 'map' under the lid for direction. Check all fuses and relays and post back.

you could just have dead cell in the battery which isn't getting enough amps to the starter,, have the battery LOAD checked,, that will tell you if the battery is actually good, just because it registers 12 volts isn't necessarily an indication that the required amps are present.

check for corrosion on the large positive wire that leads to the starter. allthough you have 12 volts, but corrosion cant handle amperage. or it may be possible that you just need a new starter, you can remove the starter, and apply a seperate power source like a jump pack or seperate battery to verify that the starter is ok

check fuse 5 and 8. If ok, replace the starter. Also what voltage is in the battery. You need to know this in case you have a failed battery. It needs to be checked while cranking. If it drops to below 10 volts you will get no click.