2015 stock JK. 25,000 miles. The other day it wouldn’t start just one click. No sign of weak battery. The fuse box wasn’t closed all the way (from last service presumably). No engine light code, just dashes then Done. Would prefer to avoid needing to get it towed to the dealer to fix, or ideally fix myself but would need to be simple. Very clean, no signs of corrosion. Any ideas? Thanks.