Due to the age of these Jeeps and the fact that the factory power wiring from battery, to alternator, and the grounding to frame is just not up to par. Enter the guys at KSuspensionFab with this awesome kit: Cable upgrade kit
All of the cables come pre-labeled, you'd have to really not be paying attention to mess up. Watch the video on their website if you need step-by-step instructions, but if you're like me, you dive right in until you get stuck, and then refer to the video, right?
Here are a few photos of the cable upgrade, and what the crappy factory power cables look like compared to the 2AWG ones from KSuspensionFab.