I connected the battery backwards, is it okay?

Hello friends. I have a 2004 307xt 1.6 hdi vehicle. I was getting an error because egr electro valve stuck while learning. Today I said that I would take the egr off and clean it, maybe try my luck so that it will improve. I also removed the battery to make room for myself to work comfortably. While I was disconnecting, I saw that the battery was leaking acid and the flowing acid seeped into the cable channel coming out of the brain. I melted some cables and tidy them up. I cleared the egr. I got bad news, I had to quit the job. When I was installing the battery to lock the doors, I accidentally plugged the polarities reversed in the dark and removed it when I arc. I installed it correctly, I tried to lock the doors, the car did not react. then I turned on the ignition and there was no movement. not even a light came on. I had to leave the car like that and get out. what do you think i will encounter when i return in the morning Could the brain be burned or what do you suggest I do?

Sir, first of all, get well soon. My advice is to change your fuses and check the lines one by one with avmeter to see if there is a short circuit. Start your vehicle like that. at worst, bsi and ecu may have been damaged.

[QUOTE = sonerkyl] First of all, get well soon. My advice is to change your fuses and check the lines one by one with avmeter to see if there is a short circuit. Start your vehicle like that. worst case bsi and ecu may have been damaged. [/ QUOTE] thank you teacher. let me try as you said