Can't fire up. Buzzing from the relay, lamps blinkin- HELP

[mrgud]

ok, after few days of rest, here is the bump up...

No, we did not fire the car up, and no, we did not fix the problem with the electric system...

- checked and changed all relays, in the engine bay, in the interior, even the ones around the ECU- NO GO... everything the same...
- checked the efi- the 1/4 of Hachi that I got for parts had the ECU on it. The man I boughtr that hunk of garbage said that before he sold the engine and tranny he the buyer fired up the engine, so that ECU is fine... Connected that one instead of mine- still the same...
- checked all fuses on the car (took them down and checked them with the unimer- a friend said that the fuse can be false(broken or out of order even if it looked good)- all fuses fine...
- checked the mass of the car, visualy checked the cables, of the ground
- checked the conection on the main conector in the engine bay (the one on the firewall abowe the engine...)

- than Meshin started measuring and checking the power on the fuse box in the engine bay... One by one fuse out and checked the conector. He found that the fuse conector has curent on both pins... It is suposed to have curent only on one- 12V, the other must be 0. This one had 12 and 10 V on it... (I believe it was the EFI fuse)
- so- the fuse was fine, but it had curent on both pins (ground and +)- obviously there is some electricity brake-away somewhere, some wire is loos or something burned and short-cutted it self...

- checked the ignition switch on the ignition key (behind the ignition lock)- by the scheme in the manual- AyOkay- not burned, and funktional...

- now- there is something wrong around the fuse box in the engine bay or somewhere between the ignition key lock, the fuse box in the car and the fuse box in the engine bay...

As Mao Tse-Tung said once: "Even a kick in the ass is a step forward!"

I still don't know what is wrong- but I'll find out... and when I do, call me "the Hachi exorcist guru"!!
Offcourse, if somebody has the faintest idea what the hell is wrong, please, express your opinion...

(HINT: these are the simptoms, in short;
- when the batery is conected, you turn the key to acc- one of the relays in on the fusebox in the interior buzzes and the check engine and batery lamps glow slightly, turn the key to give contact - check engine lamps goes off, you have only the batery lamp. Chranck the car it crancks but still check engine lamp is of... turn the key off again, the relay buzzes the 2 lamps glow slightly again... )