Pre-Wired Guitar wiring harness | Jazzmaster Lead Circuit Series Mod kit | Right Handed
Please use the tabs below to read through the information about this Pre-Wired harness kit. From a run down of what the kit does, to important fitting information and full specs.
Order times
I usually make harnesses to order, due to the variety of spec options that could be chosen across the whole range. The current turnaround time for a Jazzmaster harness order is around 5-7 working days depending on quantity of orders in at the time and your order will be updated accordingly when it is dispatched. This turnaround time doesn't include the transit time. Thanks for your patience whilst I get your harness made!
Model Description
It's no secret that I love Jazzmasters. From the comfort of the offset body shape, to the intuitive trem and ultimately, the sound. So this harness was definitely driven by the passion I have for the Jazzmaster design.
This particular harness is for a lead circuit only 'conversion' so to speak with a fun extra mod brought over from an option available on my full JM kit range. So this harness is wired in a world where the rhythm circuit doesn't exist, and is totally a standalone lead circuit.
It is great for those who wish to remove the rhythm circuit from their Jazzmaster, perhaps building a JM partscaster and don't wish to fit a rhythm circuit, or perhaps are planning a build based around non JM single coils, with humbuckers instead perhaps.
This specific kit includes a push/pull CTS 450 series pot in the tone position, providing you with an additional sound, both pickups in series! A chunky tone, a boost in output and just a fun extra addition to this stripped back JM lead circuit layout.
How the controls and pots work
Master volume control
Master tone control
Switching (3 way toggle) w/push/pull pot down
Position 1 - Bridge pickup
Position 2 - Bridge pickup and neck pickup in parallel
Position 3 - Neck pickup
Push/Pull pot up
Overrides other pickup selections/positions and provides bridge and neck pickups in series
Please note, website example photo(s) may differ visually from the wiring kit you receive. This could be for a number of reasons but ultimately, don't be alarmed if you do spot differences between the stock photo and your supplied kit.
Product options
Product Options
With or without Treble Bleed?
First up, what does it do? Without a 'treble bleed', when you roll down the volume pot it will naturally lose some of the treble frequencies through the sweep. A Treble Bleed kit takes the 'high' treble tone frequencies out of the circuit at the volume pot, and puts them back in the circuit as the signal leaves the volume pot. This means the treble frequencies are prevented from naturally bleeding out of the circuit as your turn your volume pot down. The result is a smoothed out treble and a more uniform tone from 1 to 10. Reducing the treble drop out as the volume pot rolls off. Some guitar players wouldn't be without a treble bleed, and many have never used one on their guitars. Truth is, it is very much personal preference. If you like the idea of retaining treble as you roll your volume pot down, then a treble bleed is for you! For the standard spec, I use a ceramic .001uF capacitor with a carbon film 120kOhm resistor parallel wired.
Wiring diagram and wiring info
Pre-Wired kit general fitting guide - HERE
Wiring Diagram - HERE
Soldering ground wires to pot casings - HERE
Wiring FAQs - HERE
Fitting information
I have intended for my wiring harnesses to be as simple as possible to install to your Jazzmaster, but in this section you'll find some important fitting notes that will hopefully help you assess whether the kit is suitable for your exact JM or what is required to allow it to fit correctly.
As the push/pull pot sits deeper than a standard pot, it may also be worth double checking the cavity depth in your specific Jazzmaster to ensure it will fit this deeper pot size. The CTS push/pull pot measures 31mm, from pickguard edge to top of pot casing. Traditional Jazzmaster body cavities will accomodate for this, but it is certainly worth double checking yours prior to ordering/installing.
Can I fit this kit myself?
This ultimately comes down to whether you own the equipment needed to correctly and safely install the kit, or how comfortable you feel working on your own guitar. I do feel that installing a pre-wired guitar harness is do-able for many guitarists but only if the correct tools are used and care is taken to ensure you do not damage the kit, your guitar or yourself! There are detailed installation guides here on my website, as well as simple to follow wiring diagrams all to help make the process as easy as possible and in my experience, these have helped thousands of my customers carry out their own install. But if for any reason you have concerns about fitting the kit yourself which is entirely understandable, then I'm sure you'll agree that it is likely best to have a professional fit the kit and help ensure your purchased kit, and your beloved guitar are both looked after and worked on correctly.
If you are local to me (Stourbridge, West Midlands) I take on guitar work no problem at all so will certainly be able to help install your Signature Series harness.
I would also note here, that soldering the pickup wires onto the tighter push/pull pot might be tricky for some installers. If you are well acquainted with a soldering iron, you'll sail it I'm sure, but if you a new to soldering, I would perhaps recommend having a trusted local tech install this kit for you to ensure no damage is caused to the components and it all functions correctly.
Will the pots/jack fit my pickguard and jack plate?
The components I use in my Signature Series wiring kits are for the most part, USA imperial specification, and will be a direct replacement for a genuine USA or Mexico made Fender Jazzmaster. If you're fitting this harness to different model/spec of Jazzmaster, or a far east built guitar such as a Squier or similar brand, then you may have to widen the holes in the pickguard to accommodate for these imperial measurement pots. The CTS pots and Pure Tone multi contact jack have a mounting thread shaft diameter of 0.369" / 9.38mm so I recommend for ease of install a pickguard and/or jackplate with 0.394" / 10mm pot/jack mounting holes. You can easily widen the holes in the Pickguard too if you would prefer, I recommend doing this safely with a step cutter drill bit. I also offer this as a service so if you would like me to widen your plate for you, do please get in touch and we can organise this additionally.
What control knobs will fit?
The kit uses either CTS solid shaft or CTS Split shaft pots depending on which spec you choose from the options.
Split shaft pots have a adjustable split shaft diameter of 5.95mm w/ 24 splines. You will need control knobs that push-fit and suit these measurements.
Solid shaft pots have a solid shaft diameter of 1/4" / 6.30mm. You will need control knobs that suit these measurements and secure to the pot via a grub screw on the control knob.
Do not attempt to force fit smaller, metric/import spec control knobs onto the imperial USA spec pots, doing this can damage the pot.
If you do require a US spec control knobs, I do carry a selection of popular options in stock and they can be viewed in the Control Knob category on the store.
Which switch tip will fit?
Much like with the control knobs, the Switchcraft pickup selector in this kit is USA spec, with imperial thread sizes. Therefore you need a imperial thread switch toggle tip to suit Switchcraft toggles.
If you do require a US spec switch tip, I do carry a selection of popular options in stock and they can be viewed in the Switch Tips category on the store.
Specs/Parts included
- 1x CTS '450' Series 500k audio taper pot
- 1x CTS '450' Series 500k Push/Pull audio taper pot
- 1x .022uF Mustard tone capacitor
- 1x Switchcraft right angle 3 way toggle switch
- 1x Pure Tone multi contact jack socket
- Gavitt USA made cloth covered 22AWG wire
- 20AWG Tinned copper ground
- Soldered using R-Tech Premium Lead-Free (Sn95.5Ag3.9Cu0.6) 22swg Solder wire
RoHS Compliant
RoHS Compliant components are used throughout pre-wired assemblies. All components used in this assembly are being used for their intended purposes stated in the guidelines by their relevant manufacturer. Any use outside of stated or recommended guidelines is entirely up to the customer, but sales support/warranty/refunds are then extinguished. For a run down of the manufacturers and product data sheets you can click HERE
Please note - wiring kit does not include new control knobs/switch tip etc but does include the switch/pot/jack mounting nuts, washers & screws. Please see above spec/item list for full detailed run down of what is included or drop me a message if you aren't 100% sure.
Why these spec parts over others available?
Simply put, component choice has been one of the most important parts of my product development. I have worked on guitars for many years, and built these kits professionally since 2015, and as a result have been able to see and experience working on the majority of components available on the market. In my findings, A/B testing and more, I have found the components I decided on for my Signature Series to be the most reliable, best tolerance and great functioning parts to use to help customers get the most out of their instruments. I use CTS '450' series premium spec pots as they have a tight tolerance, and will consistently provide me with accurate value, as well as very solid build quality. I use trusty 'Mustard' style polyester film 'tone' capacitors as in my opinion they simply can't be beat for great value, solid construction, solid lead-outs, super tight tolerances and reliable tone/function. I would personally much rather use a trusty Mustard for example over something like a paper in oil, as from experience that are so much more reliable to use. This is from carrying out a lot of A/B testing, both tonally, as well as armed with the multi-meter for testing values and actual tolerances, as well as handling them to test construction quality for long lasting reliability in use. I use the brilliant 'Pure Tone' Multi Contact Jack sockets as they are incredibly reliable, due to their additional contact points for both tip and sleeve. I use CRL, Oak and Switchcraft brand switches across the range as these are built very well, with care will last for many years to come and have long since provided me with reliable use professionally. All kits are wired up with quality USA made Gavitt wire, it's great to work with, super consistent gauge and provides me with a very reliable quality item for my kits. I totally understand that with anything guitar, it is subjective, but I have, with an open mind, thoroughly tested a broad variety of components over the years and these have all become the items I trust to use every day.
Harness FAQ's
I've been proudly making, developing and installing my pre-wired guitar harnesses since the beginning of the Home of Tone back in 2015 (time flies when you're having fun right!). Although I feel I do my best in covering as much information as possible across the various product listings, fitting guides, wiring diagrams and more, I thought it might be helpful to put together an FAQ's page that covers some of the general additional questions I get asked. You can view these Harness FAQ's HERE
'Ground Bug' deal!
Looking forward to installing your new wiring, but a little worried about making the ground connections to the pot casings? First time soldering and hear the horror stories of frying pots, or just simply want to neaten up your installs? Then the awesome 'Ground Bug' will help with any of these concerns, beginner or pro modders alike. The Ground Bug is a pot washer that fits between the pot casing and the pickguard/body and has a number of lugs (much like with the main signal connections on the pot for example) to which you can very easily solder your ground wire connections too. Completely removing the worry and risk of soldering a pot casing, something I know many guitarists complain about having to learn to do.
I have been stocking Ground Bugs for a while, and they really are the perfect match for a pre-wired harness as they further help you with your installs. So I have set up a 10% off Ground Bug deals when purchased with a Home of Tone Signature Series pre-wired harness. This is an automatic discount code, so all you need to have is a Signature Series kit, and a Ground bug in your cart, and the discount will automatically be applied to the bug for you! Click HERE to view the Ground Bug listing
Do you make custom harnesses?
I'm afraid I do not offer a custom harness service. Only kits developed, tested and listed on my website are the available kits. So no custom schematics etc. If you happen to be local to my office, then I do carry out custom work in house, but in regards to shipped out pre-wired harnesses I do not offer custom kits. I am however happy to use different pot values or cap values within reason if you have a specific requirement that differs to the specs listed above. If this is relevant to yourself then please get in touch to discuss further to ensure the request is possible.
GPSR & Safety info
Manufacturer: James' Home of Tone, Laburnum Street, Stourbridge, DY8 4NX, UK.
Email: james@homeoftone.co.uk
EU Authorised Representative: Global Trade Department NI, Office 834, 92 Castle Street, Belfast, BT1 1HE, Northern Ireland. Email: Contact@GlobalTradeDept.com
Please use the tabs below to read through the information about this Pre-Wired harness kit. From a run down of what the kit does, to important fitting information and full specs.
Order times
I usually make harnesses to order, due to the variety of spec options that could be chosen across the whole range. The current turnaround time for a Jazzmaster harness order is around 5-7 working days depending on quantity of orders in at the time and your order will be updated accordingly when it is dispatched. This turnaround time doesn't include the transit time. Thanks for your patience whilst I get your harness made!
Model Description
It's no secret that I love Jazzmasters. From the comfort of the offset body shape, to the intuitive trem and ultimately, the sound. So this harness was definitely driven by the passion I have for the Jazzmaster design.
This particular harness is for a lead circuit only 'conversion' so to speak with a fun extra mod brought over from an option available on my full JM kit range. So this harness is wired in a world where the rhythm circuit doesn't exist, and is totally a standalone lead circuit.
It is great for those who wish to remove the rhythm circuit from their Jazzmaster, perhaps building a JM partscaster and don't wish to fit a rhythm circuit, or perhaps are planning a build based around non JM single coils, with humbuckers instead perhaps.
This specific kit includes a push/pull CTS 450 series pot in the tone position, providing you with an additional sound, both pickups in series! A chunky tone, a boost in output and just a fun extra addition to this stripped back JM lead circuit layout.
How the controls and pots work
Master volume control
Master tone control
Switching (3 way toggle) w/push/pull pot down
Position 1 - Bridge pickup
Position 2 - Bridge pickup and neck pickup in parallel
Position 3 - Neck pickup
Push/Pull pot up
Overrides other pickup selections/positions and provides bridge and neck pickups in series
Please note, website example photo(s) may differ visually from the wiring kit you receive. This could be for a number of reasons but ultimately, don't be alarmed if you do spot differences between the stock photo and your supplied kit.
Product options
Product Options
With or without Treble Bleed?
First up, what does it do? Without a 'treble bleed', when you roll down the volume pot it will naturally lose some of the treble frequencies through the sweep. A Treble Bleed kit takes the 'high' treble tone frequencies out of the circuit at the volume pot, and puts them back in the circuit as the signal leaves the volume pot. This means the treble frequencies are prevented from naturally bleeding out of the circuit as your turn your volume pot down. The result is a smoothed out treble and a more uniform tone from 1 to 10. Reducing the treble drop out as the volume pot rolls off. Some guitar players wouldn't be without a treble bleed, and many have never used one on their guitars. Truth is, it is very much personal preference. If you like the idea of retaining treble as you roll your volume pot down, then a treble bleed is for you! For the standard spec, I use a ceramic .001uF capacitor with a carbon film 120kOhm resistor parallel wired.
Wiring diagram and wiring info
Pre-Wired kit general fitting guide - HERE
Wiring Diagram - HERE
Soldering ground wires to pot casings - HERE
Wiring FAQs - HERE
Fitting information
I have intended for my wiring harnesses to be as simple as possible to install to your Jazzmaster, but in this section you'll find some important fitting notes that will hopefully help you assess whether the kit is suitable for your exact JM or what is required to allow it to fit correctly.
As the push/pull pot sits deeper than a standard pot, it may also be worth double checking the cavity depth in your specific Jazzmaster to ensure it will fit this deeper pot size. The CTS push/pull pot measures 31mm, from pickguard edge to top of pot casing. Traditional Jazzmaster body cavities will accomodate for this, but it is certainly worth double checking yours prior to ordering/installing.
Can I fit this kit myself?
This ultimately comes down to whether you own the equipment needed to correctly and safely install the kit, or how comfortable you feel working on your own guitar. I do feel that installing a pre-wired guitar harness is do-able for many guitarists but only if the correct tools are used and care is taken to ensure you do not damage the kit, your guitar or yourself! There are detailed installation guides here on my website, as well as simple to follow wiring diagrams all to help make the process as easy as possible and in my experience, these have helped thousands of my customers carry out their own install. But if for any reason you have concerns about fitting the kit yourself which is entirely understandable, then I'm sure you'll agree that it is likely best to have a professional fit the kit and help ensure your purchased kit, and your beloved guitar are both looked after and worked on correctly.
If you are local to me (Stourbridge, West Midlands) I take on guitar work no problem at all so will certainly be able to help install your Signature Series harness.
I would also note here, that soldering the pickup wires onto the tighter push/pull pot might be tricky for some installers. If you are well acquainted with a soldering iron, you'll sail it I'm sure, but if you a new to soldering, I would perhaps recommend having a trusted local tech install this kit for you to ensure no damage is caused to the components and it all functions correctly.
Will the pots/jack fit my pickguard and jack plate?
The components I use in my Signature Series wiring kits are for the most part, USA imperial specification, and will be a direct replacement for a genuine USA or Mexico made Fender Jazzmaster. If you're fitting this harness to different model/spec of Jazzmaster, or a far east built guitar such as a Squier or similar brand, then you may have to widen the holes in the pickguard to accommodate for these imperial measurement pots. The CTS pots and Pure Tone multi contact jack have a mounting thread shaft diameter of 0.369" / 9.38mm so I recommend for ease of install a pickguard and/or jackplate with 0.394" / 10mm pot/jack mounting holes. You can easily widen the holes in the Pickguard too if you would prefer, I recommend doing this safely with a step cutter drill bit. I also offer this as a service so if you would like me to widen your plate for you, do please get in touch and we can organise this additionally.
What control knobs will fit?
The kit uses either CTS solid shaft or CTS Split shaft pots depending on which spec you choose from the options.
Split shaft pots have a adjustable split shaft diameter of 5.95mm w/ 24 splines. You will need control knobs that push-fit and suit these measurements.
Solid shaft pots have a solid shaft diameter of 1/4" / 6.30mm. You will need control knobs that suit these measurements and secure to the pot via a grub screw on the control knob.
Do not attempt to force fit smaller, metric/import spec control knobs onto the imperial USA spec pots, doing this can damage the pot.
If you do require a US spec control knobs, I do carry a selection of popular options in stock and they can be viewed in the Control Knob category on the store.
Which switch tip will fit?
Much like with the control knobs, the Switchcraft pickup selector in this kit is USA spec, with imperial thread sizes. Therefore you need a imperial thread switch toggle tip to suit Switchcraft toggles.
If you do require a US spec switch tip, I do carry a selection of popular options in stock and they can be viewed in the Switch Tips category on the store.
Specs/Parts included
- 1x CTS '450' Series 500k audio taper pot
- 1x CTS '450' Series 500k Push/Pull audio taper pot
- 1x .022uF Mustard tone capacitor
- 1x Switchcraft right angle 3 way toggle switch
- 1x Pure Tone multi contact jack socket
- Gavitt USA made cloth covered 22AWG wire
- 20AWG Tinned copper ground
- Soldered using R-Tech Premium Lead-Free (Sn95.5Ag3.9Cu0.6) 22swg Solder wire
RoHS Compliant
RoHS Compliant components are used throughout pre-wired assemblies. All components used in this assembly are being used for their intended purposes stated in the guidelines by their relevant manufacturer. Any use outside of stated or recommended guidelines is entirely up to the customer, but sales support/warranty/refunds are then extinguished. For a run down of the manufacturers and product data sheets you can click HERE
Please note - wiring kit does not include new control knobs/switch tip etc but does include the switch/pot/jack mounting nuts, washers & screws. Please see above spec/item list for full detailed run down of what is included or drop me a message if you aren't 100% sure.
Why these spec parts over others available?
Simply put, component choice has been one of the most important parts of my product development. I have worked on guitars for many years, and built these kits professionally since 2015, and as a result have been able to see and experience working on the majority of components available on the market. In my findings, A/B testing and more, I have found the components I decided on for my Signature Series to be the most reliable, best tolerance and great functioning parts to use to help customers get the most out of their instruments. I use CTS '450' series premium spec pots as they have a tight tolerance, and will consistently provide me with accurate value, as well as very solid build quality. I use trusty 'Mustard' style polyester film 'tone' capacitors as in my opinion they simply can't be beat for great value, solid construction, solid lead-outs, super tight tolerances and reliable tone/function. I would personally much rather use a trusty Mustard for example over something like a paper in oil, as from experience that are so much more reliable to use. This is from carrying out a lot of A/B testing, both tonally, as well as armed with the multi-meter for testing values and actual tolerances, as well as handling them to test construction quality for long lasting reliability in use. I use the brilliant 'Pure Tone' Multi Contact Jack sockets as they are incredibly reliable, due to their additional contact points for both tip and sleeve. I use CRL, Oak and Switchcraft brand switches across the range as these are built very well, with care will last for many years to come and have long since provided me with reliable use professionally. All kits are wired up with quality USA made Gavitt wire, it's great to work with, super consistent gauge and provides me with a very reliable quality item for my kits. I totally understand that with anything guitar, it is subjective, but I have, with an open mind, thoroughly tested a broad variety of components over the years and these have all become the items I trust to use every day.
Harness FAQ's
I've been proudly making, developing and installing my pre-wired guitar harnesses since the beginning of the Home of Tone back in 2015 (time flies when you're having fun right!). Although I feel I do my best in covering as much information as possible across the various product listings, fitting guides, wiring diagrams and more, I thought it might be helpful to put together an FAQ's page that covers some of the general additional questions I get asked. You can view these Harness FAQ's HERE
'Ground Bug' deal!
Looking forward to installing your new wiring, but a little worried about making the ground connections to the pot casings? First time soldering and hear the horror stories of frying pots, or just simply want to neaten up your installs? Then the awesome 'Ground Bug' will help with any of these concerns, beginner or pro modders alike. The Ground Bug is a pot washer that fits between the pot casing and the pickguard/body and has a number of lugs (much like with the main signal connections on the pot for example) to which you can very easily solder your ground wire connections too. Completely removing the worry and risk of soldering a pot casing, something I know many guitarists complain about having to learn to do.
I have been stocking Ground Bugs for a while, and they really are the perfect match for a pre-wired harness as they further help you with your installs. So I have set up a 10% off Ground Bug deals when purchased with a Home of Tone Signature Series pre-wired harness. This is an automatic discount code, so all you need to have is a Signature Series kit, and a Ground bug in your cart, and the discount will automatically be applied to the bug for you! Click HERE to view the Ground Bug listing
Do you make custom harnesses?
I'm afraid I do not offer a custom harness service. Only kits developed, tested and listed on my website are the available kits. So no custom schematics etc. If you happen to be local to my office, then I do carry out custom work in house, but in regards to shipped out pre-wired harnesses I do not offer custom kits. I am however happy to use different pot values or cap values within reason if you have a specific requirement that differs to the specs listed above. If this is relevant to yourself then please get in touch to discuss further to ensure the request is possible.
GPSR & Safety info
Manufacturer: James' Home of Tone, Laburnum Street, Stourbridge, DY8 4NX, UK.
Email: james@homeoftone.co.uk
EU Authorised Representative: Global Trade Department NI, Office 834, 92 Castle Street, Belfast, BT1 1HE, Northern Ireland. Email: Contact@GlobalTradeDept.com
