For starters, pull the fuse for it. Then protect the end of the wire with either tape or heat shrink tubing. If it's exposed to the elements, water proof heat shrink. I usually fold it over or if it's long enough, coil it up and tie it out of the way. By all means, do NOT use cheap electrical tape unless you like a goey mess & crack when revisiting the wire after a hot summer. Super 33 by 3M is the best.