Hello!
i have a gs300 1999, the car has not been started in serval months. So the battery was dead, and i tried to jump start it. Connected the cabels and everything worked, light, fan and so on. But when i turned the key everything died and got black. Just like a blown fuse.
Does anyone have any idea what it could be?

sorry if it is hard to understand, english in not the language i normaly speak

 

First off, welcome! Second, your English is perfectly fine - better than some native speakers here :-)

As for your issue, 99% positive your battery is bad. It sounds like it is shorted internally, and while it'll have enough for the lights and such when you have the cables on it, it's not enough to start the car.

Good luck and report back!

Dave

 

Thank you!
the thing is now does nothing happen when i connect the cabels, no light no fan, nothing

 

Do you think you hooked up the jumper cables backward? If you do so, it will blow the 120 alternator fuse in the panel next to the battery I have read. Inspect these fuses. Next, I'd recommend starting with a battery that isn't flat to try and crank the car.

 

I think it was jumped backwards too. If the issue is no power to anything at all after attempting to jump, it blew a main fuse.

 

I dont think i messed up the cabels but who knowsSo next thing to check is 120A fuse, but wouldnt the fuse have blown direct when i connected the cabels? Because all lights and everything worked when i turned the key the first step, with the cabels on.
it was when i turned the key to start the car everything died.