Please, I do not know what is the issue exactly, I was trying to start my car today but it did not start at all, even I do not have power in all the car the interior lights, the door, I tried to use the jumper to start it but no thing at all, not even the light for the security system, that is weird, yesterday it was working with out any issue, but today I am so disappointed from what happened, could you help my to know what is issue please.
Agree. The first and most fundamental check is 12v voltage using a meter. If there are no lights or indications of power anywhere I would suspect a fuse has blown. Voltage checks in the engine fuse box is the place to check, again using a meter. Measuring at the 30 amp Engine WP fuse would be helpful.