[header] How to make battery cables [title] Lift the hood and check the battery, as well as all connected lines and cables, for rust, corrosion or bad connections. [step] Before making new cables, check which ones actually need to be replaced. Remove any snapped, chipping, weak, crusty, or otherwise bad-looking cables so you know what needs to be replaced. 
[title] Ensure you have the same gauges of terminals, terminal lugs, and cables. [step] On the cable should be a number with a slash in it, like " 2/0, " followed by the letters " awg.