Key inseeted and turned to on position. Green neutral light appears as per normal. No noise of fuel pump filling carbs. Absolutely nothing when start button pressed. Headlight and horn work ok. Any suggestions as to what's wrong?

https://www.bluetraxx.com/threads/warrior-electrical-problems.80210/

This forum might be of some help to you.

What exactly does it do when you turn the Key? Are there any dashboard lights staying on that normally go out when you turn the key to position 2?
Does it do absolutely 'Nothing' with the dash lights staying on? Does it do nothing but the dash lights go off?
Dash lights go off and you get a 'Clunk' noise?
Absolutely nothing suggests security system or the actual ignition key/barrel. This often has a light on the dash shaped like a key. Nothing but the lights go off could be the starter solenoid. Lights of and a 'clunk' could possibly be the starter itself.
The solenoid will be bolted directly to the starter motor. It's the smaller barrel shaped section on the side of the actual starter motor.

You have many problems.
1. For the fuel pump
i. Check fuel pump fuse in fuse panel.
ii. Turn on the ignition key to start position without engine cranking.
iii. Listen at the same time for 2 seconds if you can hear the sound of the fuel pump near the fill fuel neck (remove the fuel cap).
iiii. At the fuel pump relay place, a test light back probes the green wire or trigger wire with a test light. It is activated by the PCM (Powertrain Control Module) for 2 seconds (priming the fuel system). /When you start the engine, that same wire will receive a + signal but steady. Then you should find your fuel pump problem. (could be the fuel pump itself not working).
If you need to change the fuel pump.
You have to remove the fuel tank. When the fuel tank is halfway down (before removing the fuel pump) test the + signal at the tank (could be a wires problems)

2. The neutral light problem belongs to the neutral switch system (PRNDL) attach to transmission.
3. Starter Problem
i. Could be rusted positive and negative connections at the battery (Voltage drop in the + battery terminal should not be more than 500mv.
if more remove terminal and clean it. Same thing at the starter motor's end (Same thing with the ground at the Battery to the engine. if OK then the starter motor itself is the defect.

Hope it helps.

If the engine does not crank, I doubt it has anything to do with the fuel system. You would need to find out if you have power at the starter posts when the key is in start position. Will it crank in neutral, and is the security light flashing ?

Hello fuel pump has absolutely nothing to do with the car turning over try to start the car in neutral.Also is your battery connections good and clean?

If the check engine light comes on then there must be a trouble code stored in the PCM memory. What is the code when you turn the key on,off,on ,off... then leave it on....count the engine light blinks. (Don't start the engine during the key procedure) each series of blinks will be a digit.

Good info on the PATS / theft light. Looks to be the PATS / HEC operation is functioning correctly

The Fuel inertia switch only cuts power to the fuel pump, so if tripped, the truck would have a crank no start issue. Do you have a crank no start, or no crank issue.

To reset, just press down on it. To check if the switch is tripped, check for power at the connector to the fuel inertia switch

Engine compartment fuse # 10 ( 20A ) to the fuel pump relay -> Dark Green w/ yellow stripe wire to the fuel inertia switch -> pink w/ black stripe wire to the fuel pump module.
Check the pink w/ black stripe wire to ground with a meter for power, with the key in the run position.

If you turn the key from off to run ( do not start ) you should hear the fuel pump cycle ( hum, then turn off ).

Could be an issue with the fuel pump relay ( my '01 had a crank no start at ~ 35K miles, bad fuel pump relay ). I proved this out ( after a stupid ID10T error in my diagnoses process ) by jumpering the normally open contacts in the fuel pump relay socket, and then installing the trailer tow reverse circuit relay into the fuel pump relay socket ( same full size Ford Relay ).

Jumpering the fuel pump relay in the relay socket ( remove relay and use jumper wire ), red line


If you have a no crank issue, could be the DTR ( Digital Transmission Range ) sensor on the driver's side of the trans is out of alignment.

Check the start motor relay ( on the firewall on the passenger side ) for power on the Tan w/ Red stripe wire when the key is in the start position ( this is from the ignition switch through the DTR when in park or neutral to the starter motor relay ).

You can test another route, turn the key to the run position, and apply power to the Tan w/ Red stripe wire on the starter motor relay in the engine compartment on the firewall. BE CAREFUL, the motor should turn over, keep clear of moving parts.

Post back a comment to this problem with the results of the testing.

Thanks

no. the noise you're not hearing is the fuel pump. When u turn ur key on you should hear a buzzing like sound from the rear of the vehicle. If not, and ur car don' start, probably fuel pump. Just to verify the faulty fuel pump, have an assistant open the fuel tank cover and remove the gas cap itself. With you inside turn just the key on, and have your assistant listen for the "buzzing" or "hummin" sound. if nothing there, then faulty fuel pump. If noise is present, then perhaps you have a different problem like nothing is reaching the engine, fuel wise. Like a plugged fuel filter. when replacing the fuel pump, ALWAYS do the new strainer as installing the old one could cause a whole new set of problems and eventually wipe out the new one as well *RULE OF THUMB, WITH NEW FUEL PUMP, REPLACE FUEL FITLER.* this will be easier on the pump output to the engine. good luck.!

Your fuel pump is supposed to hum, when you turn the key it primes the system and it will hum. When the car is running the fuel pump is running and it will hum. If the noise is excessive then try a higher quality fuel pump, it may be less noisy. You will hear the fuel pump on a lot of vehicles tho when you are sitting at a stop light with your radio off and everything quiet in the car.

Just turn key as far as run, and you should hear it. If no luck, spray WD-40 in throttle body intake, and try starting.If it fires up, it's a fuel problem, if not, check for spark.