My instrument cluster now looks like normal. I had to reset the time and the date, but that's about it so far that I have noticed. I guess the LR4 computer does some weird stuff when it has low voltage. The SM relay from what I can gather stands for "Starter Motor" or Start Motor (please know, all I know is what I have read on forums) and can get stuck in the closed position, where it did in my case, draining the bad battery to the point where it can't get jumped. Other than this, I am still learning. But yes, in my case, I had to completely disconnect this relay and reset it (pull it out/then push back in) prior to putting in the new battery.