It is not necessary to replace the wiring in a G5120, but you will get about 10% more clarity from a new wiring harness. You can replace one or both of the pickups. They have about the same volume output as the stock pickups.

You’ll need the Tone Pot wiring harness with split-shaft pots and a standard long switch. You may also want to purchase a new switch tip as well. The stock switch tip is metric and will not thread onto the new switch. The Tone Pot Tube Kit is very helpful with the installation.