Pre-Wired bass guitar wiring harness | Bronco bass Upgrade 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!

Harness & McNelly Pickup set - The McNelly Broncomaster pickup is currently made to order, with around a 5-6 week wait time. So if you order this full kit, I will get the pickup on order and as soon as it arrives with me, I'll wire it to my harness and have it shipped out. But expect around a 5-6 week estimate wait time currently. Many thanks!

Model Description

I am a big fan of the Squier Affinity & Sonic Bronco bass, it's a fun bass right out of the box, but it also makes for a superb modding platform. Even a few simple tweaks can make it a bass not to be overlooked, but I couldn't help but look into the electronics. Needless to say with a bass with a price tag that low, there had to be some components that were of lower quality and the electronics were certainly that. So I looked at creating a wiring harness upgrade, using the high quality components I use on my other harnesses such as CTS '450' pots, Pure Tone multi contact jack, Gavitt wire and a vintage style yellow Mustard tone capacitor. This, along with the McNelly Pickups replacement pickup, specifically designed for Bronco and Musicmaster turns this bass into a serious tonal instrument. I'm very humbled by the support for this upgrade kit over the years, many kits made and customer feedback has been amazing so a huge thank you! Glad you all like the kit so much. 

This harness, and the pickup too, with fit both Affinity and Sonic series Broncos. But please refer to fitting notes in the drop down menus for full details as it is an 'upgrade' so to speak to USA spec/sized parts.

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

With or without McNelly Broncomaster bass pickup?
I offer this pre-wired loom/harness kit as a complete upgrade alongside a pre-wired McNelly Broncomaster bass pickup. This pickup was designed by Tim McNelly specifically for the Bronco and Musicmaster bass, it features a true bass pickup design (unlike the stock Bronco pickup which is a Stratocaster guitar spec single coil) and has a great double pole piece design and hotter output for a full tone. Full description and demo video for this pickup can be found HERE. If you would like to order my wiring kit pre-wired to a McNelly Broncomaster pickup, select it via the drop down menu. If you don't wish to have the pickup and simply want the wiring kit/harness, then you can certainly do so here too. Lead times for each option chosen can be found right at the top of this product listing.
If you choose the pickup additionally, you are given the choice of a white, or black pickup cover. If you are just ordering the wiring harness, this option is not relevant.

Which pot shafts do I need?
For this kit I offer the choice of what spec of pot shaft you require. This ultimately comes down to what control knobs you plan to use on the bass. You will need new control knobs for this kit, as the pots are quality USA Imperial sizes whereas the original pots are smaller metric sized items.
Split shaft pots use push-fit control knobs whereas solid shaft pots require control knobs that fix to the pot via a grub screw. Both are a different size and measurements are detailed below.
Useful tip - If you haven't decided what style of control knobs you are going to use, and can't make up your mind yet, I would recommend choosing the split shaft version as I also offer brass conversion sleeves which would convert split shaft to solid shaft pots with ease. So best recommendation if you're not sure, go for split shaft as they can always be converted easily, whereas with solid shaft pots you are tied to that as the only choice.

CTS Split shaft pots have 24 splines and have an adjustable diameter of around 5.95mm.
CTSs Solid shaft pots have a solid post to mount the control knob to, with a diameter of 6.35mm.
If you do require US spec control knobs, we do carry a selection of popular options in stock and they can be viewed in the control knob categories on the store.

Fitting information

I have intended for my wiring harnesses to be as simple as possible to install to your Bronco, 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. Ultimately though this kit is intended to be an upgrade, and uses different sized components to the factory fitted items so I would consider this kit to be a retrofit, rather than a drop-in replacement. But in this section you'll find some important fitting notes that will hopefully help you assess whether the kit is suitable for you and 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 fit my pickguard?
The components I use in my Signature Series wiring kits are USA imperial specification. As the Bronco is produced in the far east by Squier, it comes from the factory with smaller metric spec pots/jack so you will have to widen the holes in the pickguard to accommodate for these imperial measurement components. Or alternatively, purchase a new pickguard that is already suited to the US spec components. The CTS pots have a mounting thread shaft diameter of 9.52mm so I recommend for ease of install a control plate with a 0.394" / 10mm pot mounting hole. The jack socket I use in this kit again is imperial specification, the outer thread diameter measures 0.367" / 9.32mm and ideally requires a 0.394" / 10mm hole to comfortably mount.

Centre to centre measurements between components are - 
Centre of volume pot to tone pot - 45mm
Centre of tone pot to centre of jack socket - 45mm
These measurements were taken from a Genuine Squier Bronco pickguard, but I do allow for 'give' in the wire lengths between components to allow for small differences so there is some wiggle room for installation, it's not a 'fixed' measurement by any means. If these measurements are massively different to your guitar, just let me know the precise centre to centre measurements on yours and I will make it to suit that no problem at all.

What control knobs will fit?
The kit uses CTS Split shaft pots which have a adjustable split shaft diameter of 5.95mm w/ 24 splines or (depending which spec you choose) CTS solid shaft pots which have a solid brass 6.35mm shaft for mounting the control knob. You will need control knobs that suit these measurements.
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.

Specs/Parts included

- 2x CTS '450' Series 250k audio taper pots - choice of solid or split shafts.
- 1x .022uF 'Yellow Mustard' type tone capacitor
- 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/pickguard etc but does include the pot/jack mounting nuts and washers.

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 (We recommend the 'Daddy Long Legs' Ground Bug for tighter Bronco control cavities.

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.