So its been a year since I've purchased my 2018 Durango GT. Haven't had a single issue.. then the battery died on me. I put plugged the truck to charge but quickly noticed that the battery wasn't holding the charge and kept loosing volts. my dealer warranty had expired so I went to replace the batteries and found that I had two batteries. Took them to Autozone and got two new batteries. I installed the main battery with out a problem but when I installed the auxiliary battery sparks flew and the whole truck went dark. I wasn't too sure what happened and I started doing some research and found that the auxiliary battery they gave me has the positive terminal on the right and the negative on the left.. backwards from the original auxiliary battery... I know.. I'm an idiot. I need help now. Is there a main fuse or ECU fuse that would blow in times like these?