For electrical work, repair, and troubleshooting, you need cool tools of the trade: wire strippers, razor knife, electrical tape, butt connectors, plugs, and more. It's a good idea to have all kinds of connectors on hand for repairs and installation. Don't forget heat-shrink and zip-ties while you're at it. Good wire crimpers make all the difference in your connections. Take it a step further by soldering all of your connections once crimped.