The Bright Switch
The Bright Switch is a simple mod that you can add to any guitar that will make you go “woah!” as soon as you engage it. All you need is some basic soldering skills and a Push-Pull Pot that is the correct value (250K/500K) for your guitar. (More on Pots and Pot values here.)
What it does:
On the technical end, the Bright Switch removes the added Load from your Volume Pot and Tone Pot. We define “load” as anything that is consuming electricity. Your Volume Pot, even on 10, is sucking up some of your signal. By removing the load, the pot does not consume your signal anymore. It’s like connecting your pickups direct to your output jack and bypassing the electronics.
When pushed down, your guitar is working as normal. When you pull up, you remove the Ground off of your volume pot and tone pot. This is the same as sending your guitar’s signal straight to the output jack.
Tonally speaking, when you pull up, your guitar’s tone will get brighter, fuller, more aggressive, and beefier. It’s like a boost pedal wired in to your guitar. You’ll get more definition, pick attack, and more growl.
I’m sold. How do I do this Mod? Here’s how you wire this mod up. Please note that the pot on the left is volume pot, and the Push Pull pot takes the place of your tone pot.
When your Push-Pull pot is down, all the wiring is the exact same as a Strat or a Tele. The Signal enters Lug 1 of the Volume Pot. Lug 2 connects to the input of the Tone Pot and the Output Jack. When the switch is down, your signal goes through the Cap on Lug 3 and your highs get grounded, like a normal volume pot.
Note: Look at Lug 3 of the Volume Pot: you don’t ground that to the casing like you would a normal Volume Pot. Instead, a jumper goes to the Push-Pull, with the Grounded leg of the Cap.
When you pull up, the Load (ground) eliminates off of the Cap, the Push-Pull Tone Pot, and the Volume Pot. Essentially, your pickups connect to the output jack, with no load.
Version 2:
What happens if you don’t have a tone circuit in your guitar? You can use the Bright Switch on your Volume Pot only. Keep in mind that this won’t be as noticeable as removing your Volume Pot and your Tone Pot as well. Here’s how to wire it up:
When the switch is pulled up, does the volume pot still control the guitar’s volume?
Hey Raymond – no, it does not. When we remove the ground from the volume pot, your volume pot just acts as a variable resistor. What that means in terms of actual use is that turning the volume pot down almost sounds like a Tone Pot – the tone gets darker, but never turns completely off.
I’m still a little new to this stuff and was wondering how this mod would work out on a fender style HS, but wired for dual volume/tone controls like a Les Paul. Would I need to do the mod on both tone pots for it to function with both pickups, or can it be wired in such a way that it’ll work with a single push-pull?
hello, i have a question.
i’ve read all comments in this post and i am confused.
on a volume knob-only guitar, does the bright switch mod mean that when it’s disabled, the volume knob functions normally, and when it’s enabled, the volume knob goes “up to 11” (as in, 1 more than a regular volume knob-only circuit which goes up to 10), and when going down can’t get to zero volume, and instead acts as kind of a tone knob, which rolls off the high end??
if this is correct, what does “no volume or tonal changes are possible in this setting” exactly mean??
many thanks
I have no doubt you’re awesome at you’re job and definitely know your stuff, if obvious
You’re writing and teaching skills could use some work. Imagine the people reading this, and imagine brains completely different from your own.
Think of something you’re terrible at and then ask yourself how the best way to help you would be with that subject
The tendency is to write or teach in a way we instinctively understand (ourselves) but that can leave some of us scratching our heads
Absolutely love the site, and the company and appreciate the info, great stuff. The criticism is purely constructive and said with good intentions
I am thinking of doing this to my bass. But from where does it get grounded to the output jack? Off of C? But that says ground to casing.
Also, can I make it so that it is true bypass when in the down position?
Hey Michael, make sure you run a ground jumper from the volume pot casing to the ground lug of the output jack. All metal chassis should be properly grounded. What the Bright Switch is doing is removing the ground connection from the resistance strip within the volume pot itself.
Regarding your second question, if you wanted to have the bright switch “on” all the time, rewire the push-pull section like so: instead of the Ground jumper on lugs C – F, wire the Ground jumper on lugs A-D. This way, in the down position, the ground will stay removed, unless pulled up.
This might be very interesting for a Gretsch special jet where two Dearmonds will be replaced bij Dyna P90. Ther is only threeway and master volume and tone. And I will have to replace the 250 pots with 500’s anyhow, and I have been shielding a bit.
Another option is toreverse the harness (now goig from PU’s to three way first and then to master volume and tone, then using the blender construction there. Is it true tahat when i put the blender at 70/100 the three positions wil blend like 70/30 50/50 and 30/70?
My LP Junior has a single P90. What specific parts (250k or 500k pot? What type of tone cap? etc…) will I need to do this mod?
Hello,
I’m still new to guitar wiring and so there is a couple of things that confuse me about this mod.
I have a classical volume and 2 tone pot, neck/middle on tone 1 and bridge to the other tone pot. If I replace the second pot connected to the bridge by a push/pull for this mod, how can I relink the bridge pickup that was on the previous tone pot? Should I wire all 3 pickups to tone 1?
Thanks for all the info !
There are a few things you can do, but I would recommend making a Master tone in Tone pot 2 and a push-pull Bright Switch in position 3. I don’t have a diagram, but you should be able to get the idea by checking out our Stratocaster wiring diagrams.
Hi there,
I’d like to add this functionality to my Tele but i already have two push/pull pots – one for phase and one for split… can it be done with some other kind of switch? Cheers ?