Engine will not start but starter motor operates

Hi,

First the engine was running perfect but but some mechanic said noticed the radiator fan not working so he put some wiring on the alternator and the spark plug wires, connected the fun right on the alternator with a 24v Relay, Each time I start the engine the fan also starts. It became annoying its noise and the engine temperature was ever cold, the temperature simply kept popping on the dash.

So with little information I had, I decided to reconnect the fan back to its cables hoping it will start running automatically, I waited for the engine temperature to rise but the fan never worked so I had to put it back connecting it on the alternator so it could continue to run each time engine is running. I think then that is when I made mistake, the dash went off!
I checked for blown fuses I found 10A gauge, 15A ACC were blown so I used small copper wires to fix them and 15A FOG was missing in place Then I tried the ignition on and the dash came to power but the engine wont start! Check for the spark it's there though I think the spark plugs do not look too good as well. But before I tampered with the fan the engine was running perfect.

I checked fuse box in the engine compartment all looks good, the small fuse box connected to the positive terminal of the battery is also good.
Yes, there is damage on one of the spark wires that distribute to spark plugs, where the relay and fan were connected the white cable looks brown now. I will add pictures in the morning.

This was the condition when the short circuit happened.

After checking and cleaning the blown fuses the dash came up, this is now.

Yes, that the black/red stripe cable attached to the alternator and the other small 3 cables connect to the sensor near the alternator. Heavy gauge wire. It appears to be attached (exposed connection) to a much smaller red wire. Thus where the radiator fan and relay was connected and caused a short circuit, and from the relay another cable was attached to the cylinder heard.

So do I need to reconnect the fan using the provided diagram to try the engine or just covering the exposed wiring should get it to start?

Thank you so much for your quick and helpful response. Am putting tools together to work on getting things working properly, challenge being am in a remote area far enough to a proper garage for diagnosis. I'll be back when am done putting things working.

Shorted radiator fan with a 4 pin relay on the alternator cables. Started the car to check fun running, but got nothing only saw my dash blackout. Then checked the fuse box on the drivers side, the 10A gauge fuse and 15A acc fuse melted. Removed the fan and relay circuit, replaced blown fuses and fuel pump with new. Checked for spark is there, tested injector wiring with test light all good but still my Yaris 2nz wont run after starting. I need help please?

It starts shortly then shuts off. It wont idle.

After shorting the radiator fan on the alternator cables (1 big black cable and 3 small cables) with the 4 pin relay. The dash went out, acc fuse blown, gauge fuse blown.
To fix, I first disconnected the radiator fun and relay that caused the shorting, then I also replaced the blown fuses and the fuel pump it self.
Tried key on. The dash came on. Temperature, and other warning lights all show then goes off including check engine.
Radio, wipers, A/C, headlamps all are functional, but engine wont continue to run. After starting it only stays for 2 to 3 seconds.
Then there is a strong petrol smell.

How do I check for fuel pressure without the testing too?