What is the purpose of an external jumper wire on a variable speed drill?

Answer 1

An external jumper wire on a variable speed drill is typically used to bypass certain circuit components, such as speed control or safety switches, allowing the drill to operate at a constant speed or enabling it to function when those components are faulty. This can facilitate troubleshooting or repairs, but using a jumper wire may compromise safety features, so it should be done cautiously and temporarily. Always refer to the manufacturer's guidelines before making modifications.