We highly recommend checking out the Home of Tone or McNelly Pickups Wiring Diagrams when fitting your new Pre-Wired harness or your new McNelly Pickup set! They're tried and tested by me for many years now and might help you get creative with the workings of your guitar!. Here are view-able PDF documents showing clear wiring diagrams for a range of common configurations.

Misc.

Home of Tone wiring harness fitting guide

McNelly Pickups tech requirements guide/User Manual

McNelly Pickups 4 conductor wiring colour code

Treble Bleed Mod

Tele

Standard 3-way Switch (Parallel) - Right Handed

Standard 3-way Switch (Parallel) - Left Handed with LH taper pots

Standard 3-way switch (Parallel) - Left handed with RH taper pots

McNelly 3 way HS Tele - Right Handed

4-way Switch - Right Handed

4-way switch - Left Handed with LH taper pots

4-way switch - Left handed with RH taper pots

Nashville 5 Way Switch - Right Handed

Strat

Standard/Modern 5-way Switch - Right Handed

Standard/Modern 5-way Switch - Left Handed with RH taper pots

Standard/Modern 5-way Switch - Left Handed with LH taper pots

Blender 5-way Switch - Right Handed

Blender 5-way Switch - Left handed with LH taper pots

Blender 5-way Switch - Left handed with RH taper pots

Humbucker / P90

Modern HH / P90x2, 2 volume, 2 tone, 3-way toggle - Right Handed

Modern HH / P90x2, 2 volume, 2 tone, 3-way toggle - Left handed with LH taper pots

Modern HH / P90x2, 2 Volume, 2 tone, 3-way toggle - Left handed with RH taper pots

Fifties Style HH / P90x2, 2 volume, 2 tone, 3-way toggle - Right Handed

Fifites Style HH / P90x2, 2 Volume, 2 tone, 3-way toggle - Left handed with LH taper pots

Fifites Style HH / P90x2, 2 Volume, 2 tone, 3-way toggle - Left handed with RH taper pots

Modern Single P90/H, 1 volume, 1 tone - Right Handed

Modern Single P90/H, 1 volume, 1 tone - Left handed with LH taper pots

Modern Single P90/H, 1 volume, 1 tone - Left handed with RH taper pots

Fifties Single P90/H, 1 volume, 1 tone - Right Handed

Fifties Single P90/H, 1 volume, 1 tone - Left handed with LH taper pots

Fifties Single P90/H, 1 volume, 1 tone - Left handed with RH taper pots

Offsets

Home of Tone Jazzmaster

Home of Tone Mustang

Bass

P-Bass / Bronco

McNelly P/J Bass

All wiring diagrams are copyright of either McNelly Pickups, Canada and James' Home of Tone, UK depending on the diagram. They are for personal use, not to be sold(!) etc. I list them here to help my customers when fitting their new pre-wired harnesses but I hope they may be of some help to more of you too. Please take care of yourself and your guitar when carrying out any guitar wiring work and I cannot be held responsible for any damage caused by in-experience or incorrect techniques used.


Install Guides
I am currently working through writing install guides for as many guitar types as I can. It'll be a continued project, but for now, here are the guides I have written. They may help when installing your new wiring harness.

Fifties Style LP full wiring harness install

Wiring your guitar's jack socket

Strat style full wiring harness install

Guitar wiring tips
Here are some helpful pointers if you are planning to re-wire your guitar.

- Most hobbyist soldering irons we have in our tool cupboards at home are up to the job of helping you fit your harness. For working on guitar electronics, I personally recommend a 40w iron, this will provide ample working temperature for the task at hand. For commercial product reasons, I have to use lead free solder. I personally use Rapid brand lead free on harnesses and it’ll be what I used on your harness too, so if you’re deciding which solder to use, I’d happily recommend using Rapid lead free.. It’s available in small lengths too meaning you won’t necessarily need to buy a huge reel of it.

- When soldering your pickup wires, you will need to consider the colour code of the wires. Rather unfortunately, there is no set in stone colour code used in the industry and different pickup makers and factories use their own colour codes, so please ensure you refer to their colour code diagrams prior to going ahead with soldering. My wiring diagrams have been drawn with either traditional 2 conductor or McNelly Pickups colour codes in mind. Again, a McNelly colour code diagram is available to view on the ‘Wiring Diagrams & helpful technical info’ page of the website.

- Although a complete, pre-wired harness offers a player the simplest solution of swapping your guitar’s wiring, we do recommend prior experience or knowledge of guitar wiring before attempting to fit. I do understand for some it can be a daunting task, but it can be a rewarding job to carry out if done so with the correct knowledge, tools and preparation. Soldering is a somewhat simple task, but good technique is achieved from practice and you’ll need to ask yourself whether you’re keen on practicing that technique on your pride and joy guitar. I honestly don’t want to deter anyone inexperienced from giving it a go, but perhaps find some old or broken pots for example and practice getting used to feeling the solder flow and when it ‘takes’ to a surface, this could be a big help when it comes to installing the harness and reduce the risk of damaging your new harness or guitar.