Can I do this at home or should I let a pro do it?

[SweetKetchup]

My passive P/J bass has a 2-way switch: P or J. I want to change that to a 3-way switch: P, P+J, J. Is that hard to do by myself? Should I play safe and take it to a luthier/repair shop?
Knobs are V/V/T/T if that matters.

 

[Double E]

Can you solder? Do you have the tools? Do you have the nerve?

Chances are, you can do it. Just be careful not to afflict any irreparable harm to your bass. Careful not to strip any screws, crack or chip the finish, burn the finish with your soldering iron, smash the bass into bits out of frustration...etc...

 

[two fingers]

Pic of the existing switch, please.

Also, do you have the replacement switch already?

 

[40Hz]

All that's required is a DPDT On-On-On type switch that will fit in your control cavity. It can be a traditional or mini three-way toggle or a blade type switch. It's a very easy mod to do.

 

[line6man]

Easy job. Don't waste money paying a professional to do it.