What is the best way to make an electrical connection in automotive wiring?
You can buy a butt splice kit from the auto parts store, it will consist of different size butt splices and the crimping/stripping pliers. Choose the proper size butt splice, strip a length of insulation off each end of the wire to be joined roughly half the lenght of the butt splice, put the wire in each end of the splice and crimp. Once the connection is made wrap the splice with electrical tape.