Pre-Wired Guitar wiring harness | Jazzmaster American Professional 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 harness orders 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 the American Professional model/variant where the guitar features only a lead circuit volume and tone, with a 3 way toggle switch located on the upper horn where the rhythm circuit would traditionally fit. . I offer it with a choice of traditional 1 Meg pots, or 500k pots depending on your preference or pickups you plan to use. and now also offer it with the choice of .022uF (great if it's a humbucker or P90 configuration) and the traditional JM lead circuit .033uF if you'd like to stick with the traditional spec and JM single coils.
How the controls and pots work
Master volume control
Master tone control
Switching (3 way toggle)
Position 1 - Bridge pickup
Position 2 - Bridge pickup and neck pickup in parallel
Position 3 - Neck pickup
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
Pot value?
I offer this kit with the popular and traditional JM spec 1MEG lead circuit pots, If you're looking for that vintage JM top end and chime, then this will perhaps be the choice for you.
If you have chosen a different set of pickups, like humbuckers or P90s perhaps, or simply want to tame some of the top end brightness associated with Jazzmasters, then I also offer this harness with 500k pots too.
It has become a popular choice recently to install much 'lower' value 250k pots in the lead circuit also. I have decided to list it as an option now after some feedback from a good customer whom ordered it with this spec and loved the results.
I feel that this makes my traditional Jazzmaster wiring kit a great choice as you can choose the pot type and value/spec that suits your preferences, between vintage, modern, alternative pickup and personal tastes.
Cap value options
Similarly to the choices between pots, I also offer the choice of tone capacitor value. Traditionally Jazzmasters with 1MEG lead circuit pots were paired with a .033uF tone capacitor. So if you're looking for traditional/vintage style specs, this may well be the choice for you and pairs very well with 1MEG pots.
But if you are perhaps going for 500k or 250k pots, then you may find a .033uF will soften the top end too much or create a less gradual tone pot sweep, so I also offer a .022uF cap value. Simply put, a .022uF will sound a little brighter than a .033uF cap and is a very popular pairing for 500k pots or 250k pots (as well as a popular choice for humbuckers or P90s for example if your JM has alternative pickup types).
With or without Treble Bleed?
First up, what does it do? 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! As standard I use the .001uF & 120kOhm parallel wired treble bleed mod.
Fitting information
I have intended for my wiring harnesses to be as simple as possible to install to your Jazzmaster, as well as writing in depth general fitting guides and a simple to follow wiring diagram. There are also multiple useful how-to guides regarding wiring work found HERE too. 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 Jazzmaster or what is required to allow it to fit correctly.
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.
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 CTS Solid shaft pots have a solid shaft diameter of 0.248" / 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.
CTS split shaft pots are 5.95mm w/24 splines and require a control knob that secures in place by push-fit.
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
- Choice of lead circuit pot values/specs:
2x CTS 450 Series 1MEG Audio taper (volume and tone)
2x CTS '450' Series 500k audio taper (Volume and tone)
2x CTS '450' Series 250k audio taper (volume and tone
- 1x .022uF or .033uF 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
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.
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 harness orders 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 the American Professional model/variant where the guitar features only a lead circuit volume and tone, with a 3 way toggle switch located on the upper horn where the rhythm circuit would traditionally fit. . I offer it with a choice of traditional 1 Meg pots, or 500k pots depending on your preference or pickups you plan to use. and now also offer it with the choice of .022uF (great if it's a humbucker or P90 configuration) and the traditional JM lead circuit .033uF if you'd like to stick with the traditional spec and JM single coils.
How the controls and pots work
Master volume control
Master tone control
Switching (3 way toggle)
Position 1 - Bridge pickup
Position 2 - Bridge pickup and neck pickup in parallel
Position 3 - Neck pickup
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
Pot value?
I offer this kit with the popular and traditional JM spec 1MEG lead circuit pots, If you're looking for that vintage JM top end and chime, then this will perhaps be the choice for you.
If you have chosen a different set of pickups, like humbuckers or P90s perhaps, or simply want to tame some of the top end brightness associated with Jazzmasters, then I also offer this harness with 500k pots too.
It has become a popular choice recently to install much 'lower' value 250k pots in the lead circuit also. I have decided to list it as an option now after some feedback from a good customer whom ordered it with this spec and loved the results.
I feel that this makes my traditional Jazzmaster wiring kit a great choice as you can choose the pot type and value/spec that suits your preferences, between vintage, modern, alternative pickup and personal tastes.
Cap value options
Similarly to the choices between pots, I also offer the choice of tone capacitor value. Traditionally Jazzmasters with 1MEG lead circuit pots were paired with a .033uF tone capacitor. So if you're looking for traditional/vintage style specs, this may well be the choice for you and pairs very well with 1MEG pots.
But if you are perhaps going for 500k or 250k pots, then you may find a .033uF will soften the top end too much or create a less gradual tone pot sweep, so I also offer a .022uF cap value. Simply put, a .022uF will sound a little brighter than a .033uF cap and is a very popular pairing for 500k pots or 250k pots (as well as a popular choice for humbuckers or P90s for example if your JM has alternative pickup types).
With or without Treble Bleed?
First up, what does it do? 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! As standard I use the .001uF & 120kOhm parallel wired treble bleed mod.
Fitting information
I have intended for my wiring harnesses to be as simple as possible to install to your Jazzmaster, as well as writing in depth general fitting guides and a simple to follow wiring diagram. There are also multiple useful how-to guides regarding wiring work found HERE too. 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 Jazzmaster or what is required to allow it to fit correctly.
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.
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 CTS Solid shaft pots have a solid shaft diameter of 0.248" / 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.
CTS split shaft pots are 5.95mm w/24 splines and require a control knob that secures in place by push-fit.
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
- Choice of lead circuit pot values/specs:
2x CTS 450 Series 1MEG Audio taper (volume and tone)
2x CTS '450' Series 500k audio taper (Volume and tone)
2x CTS '450' Series 250k audio taper (volume and tone
- 1x .022uF or .033uF 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
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.