Good morning Eric
I had a little trouble uploading this post this morning. Sorry for the delay.
I have taken the available information and tried to provide you with an answer on how to determine what the cause of your no start condtion is. This test will help confirm if the antitheft system is keeping the car from starting
Here's the schematic for the starter circuit.
I'll want to do some of these tests with a testlight.
The field coil in the starter relay needs about 0.25 amp minimum to be able to "pull down" the contact to allow power to come from pin 30 to pin 87 . Using a voltmeter to test the circuit can be misleading because it may show voltage where current is not available. Because we're testing the circuit "unloaded" (with the relay out), the testlight is a better bet.
In the first part of the following test, the clip on the testlight needs to be connected to the BAT - terminal. When you hook it up, momentarily touch the other battery terminal with the end of the testlight and make sure it glows brightly. It should glow that brightly when you do the tests below. Tell me if it is dim during the test. ( Later on, I'm going to get you to move the clip on the testlight lead to the BAT + )
Ok... pull the starter relay out of the underhood relay box (Ford calls this relay box the BUSSED ELECTRICAL CENTER, OR BEC for short. )
For the first test I want to have the key in the RUN position. Do not crank the engine.
Look on the underside of the relay if you have trouble figuring which pin is which. The relay pins are numbered but the box most likely isn't.
In the next tests, make sure to note is the testlight lights up as bright as it did when you tried it on the battery.
You should have power at pin 30 ... do you?
Is it the only live pin ? Check the others and tell me if any others are live.
Good, now you'll need to check pin 85. With the shifter in park, try turning the key to the start position and see if power shows up at pin 85. If it lights up, go to next step. If it doesn't light up... STOP and get back to me. You've just found a problem.
Important. I NEED YOU TO MOVE THE CLIP ON THE TESTLIGHT TO THE BAT + FOR THE NEXT STEP .
With the testlight connected to BAT + , touch it to pin 87 ... does it light up ? Yes? GOOD. No, BAD.
Last test. With the testlight still connected to BAT + , touch pin 86 and get a helper to turn the key to the start position.. Does it light up while the key is in the start position ? Yes? Good. No ? Probable antitheft function, read on to next step.
Ok, if the light didn't come on in the last test, we have confirmed a problem in the circuit to the powertrain control module. It may be a broken wire, but it most likely is a starter disable caused by the antitheft system.
You'll need a short jumper wire. You will have to strip the insulation off your jumper wire. A piece of lampcord with the ends twisted would be fine.
Ok, I want you to leave the relay out.
Make sure everything is out of the way, the engine may start. Make sure the shifter is firmly in park and set the parking brake or block the wheels.
Get someone inside the car ready to shut the engine off if it starts.
TURN THE KEY ON.
Jump pin 30 to 87 with your jumper. The starter should start cranking the engine.
What happens? Did the engine start? Did it stay running ? If the antitheft is active it won't stay running ( if it starts at all) .
I'll be around today. Let me know how you make out.