Troubleshooting non-starting 1998 Jr botheimny after 4 years

First thing to check would be to use the next spark plug but probably there is a spark unless some animal gnawed through some cables. Long term standing usually fouls the fuel system much much more than the electrical system.

Yesterday I repaired a motorbike that was not operated for two years and even with starter spray I could not get her to run without starter spray. After removing all old petrol and flushing the carburetor with new petrol everything was ok.

Gone are the times (or actually the fuels) when you could start a diesel after 5 years or a petrol engine after 2 years without problem. Now the petrol starts to get sour (vinegar) after 6 months and then starts to corrode metallic surfaces and in diesel you get bacterial growth that clogs the filters and is corrosive.

I can confirm there is spark at the spark plug (#1) . (Lucky to have a spare spark plug in the glove compartment, as the key I could find wasn't long enough

However when I put the key to ON (without cranking) there's absolutely no sound coming from the back of the car which leads to the conclusion that the fuel pump is not running.

Where should I look for the leads to the pump? Maybe there's corrosion to the contacts? Is the (-) coming to the pump from the ECU or from a ground spot on the chassis? Is there a separate fuse for the pump or it is the ECU fuse?

To add more detail: check engine light (amber) stays on with ignition ON.
Is it possible to remove the fuel pump relay and feed 12V to the pump using the contacts in the relay box? If yes, which contacts I should use?

Is there anyone familiar with the location of fuses and relays of this Jimny generation? I cannot find any fuse for the ECU, fuel pump, fuel injection etc and clearly there should be one.
The car has no MOT for 4 years, is rusty and stays outside, don't want to discover that it was towed as abandoned vehicle. I am attaching a photo of the fuse box found inside (it's a left drive car, so this is under the left side of the dash). The fuse box inside the engine compartment has just a fuse for the main relay, when I removed that one there was no "Check Engine" light when turning the key to on.