Small electric shock on the guitar body

old_internal

Electromatic
Mar 28, 2021
15
Tehran
Hey everyone.
I have a Fender Mustang I V2 and whenever I turn it one and connect it to a guitar (no pedal in the setup, just guitar and the amp) there is a small electric shock whenever my arm hit the metal parts like bridge.
I have a voltmeter and there was about 1.5 to 2 volts on the guitar body and even the cable itself!
Is this normal? Or there is something wrong with the amp?
Does the guitar cable even supposed to have a voltage in it?
 
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Ricochet

Senior Gretsch-Talker
Nov 13, 2009
22,232
Monkey Island
I had that a couple of times on a solid state practice amp. I’m not an amp tech so I asked the local TV repair guy. Turned out to be a voltage regulator. A one buck part.

Not a lethal zap but still unpleasant enough to make an argument for proper grounding on your guitar.
 

mrfixitmi

Country Gent
Mar 20, 2010
1,953
Michigan
We have a Mustang V2, and have had received no shocks from it. If I did, I would get it repaired ASAP, these issues tend to get worse, not self heal. You are wise to be concerned.
As mentioned previously, it may be the guitar.
Did you plug in another guitar and have the same issues. Sometimes a cold solder joint on the guitar's ground circuit can give a similar problem.
 

Merc

Friend of Fred
May 6, 2017
5,544
Florida
I hope you have a last Will in good order.

All joking aside, if your amp is recent it may still be under warranty assuming it’s the amp and not the guitar. I had Fender G-Dec 30 around 2010 (2-3 years old) and it had something pop with next to no sound coming out. Different than a shock, yes. But Fender took care of me and simply replaced the entire amp with a new one. My customer experience was second to none.
 

Randy99CL

Country Gent
Feb 17, 2020
2,186
Albuquerque
Have you all noticed what part of the world the OP lives in?
When I lived in Spain 40 years ago there was not one grounded outlet in my apartment. I had to run a separate wire (from water pipes) to ground my audio system, not a problem.

First I'd make sure your electrical outlet is grounded.

I remember the old days 50 years ago. My older brother Steve almost got electrocuted when he plugged in his Super Reverb in the garage and the outlet wasn't properly grounded. Correction: as I think about it now, I believe his amp only had a two-prong plug.
 
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juks

Country Gent
Nov 26, 2020
2,823
Fremont, California
Have you all noticed what part of the world the OP lives in?
When I lived in Spain 40 years ago there was not one grounded outlet in my apartment. I had to run a separate wire (from water pipes) to ground my audio system, not a problem.

First I'd make sure your electrical outlet is grounded.

I remember the old days 50 years ago. My older brother Steve almost got electrocuted when he plugged in his Super Reverb in the garage and the outlet wasn't properly grounded. Correction: as I think about it now, I believe his amp only had a two-prong plug.

You can get the same experience in the Bay Area in 2021. The house I'm in has exactly one grounded outlet. In the garage for the washing machine.

The back ground is that so many houses were built in 1950s after the war and no owner has ever upgraded the electrical systems. I've lived in many places like that here. In fact the first place end of 90s was new and had grounded outlets. The 6 places I've lived in since have had no, or one grounded outlet.
 

Charles Conner

Gretschie
May 19, 2016
269
Maryland
The electrical outlet would be the starting place on the check list for that problem.. You should have 3 prong plugs, with a good earth ground and the hot & neutral lines on their correct pins.

Inexpensive electrical outlet testers can be purchased at most hardware stores. I carry one with me on all band jobs and have seen pictures of them posted here on GT. I had a picture of mine in my computer that I was going to post here but I can't find the picture....

OOOPS Now realize where the op is located
 
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Randy99CL

Country Gent
Feb 17, 2020
2,186
Albuquerque
Guys, he lives in Iran. I don't know if his local Ace hardware has outlet testers that fit his plugs. LOL!! J/K of course! Getting a Fender tested or repaired might be tough over there too.

Not wanting to hijack the thread but we here in the US were taught a fairly short history lesson usually starting only about 400 years ago.
When you go to the Mediterranean area it boggles the mind how old things are.
I lived in southern Spain and drove on roads first built by the Romans around year One.
I was in the Navy and went on a weekend retreat that stayed in a monastery in Chipiona Spain, about 1/2 hour from the base where I worked. The monastery was obviously old but I had no idea. Found out that Ponce De Leon, that guy who looked for the fountain in Florida, had stayed at that exact same monastery. The marble steps everywhere were worn at least 2 inches in the center from many hundreds of years of foot traffic and I had placed my feet exactly in the same spot where he had walked. Boggles the mind.

My apartment was in the "old town" section of Rota Spain and the building was hundreds+ of years old. The builders didn't know to leave room for wires in the stone walls, LOL again!
The wiring was all external to the walls, the switches and outlets were stuck wherever they wanted them and nothing was grounded. I've seen the same in England, Sicily, Italy, Morocco and that whole area.

So I'm hoping the OP lives without grounded outlets and he can run a wire to some cold water pipes to ground the amp and any other electronics he owns. And I'm hoping that fixes his problem.
 
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Merc

Friend of Fred
May 6, 2017
5,544
Florida
Guys, he lives in Iran. I don't know if his local Ace hardware has outlet testers that fit his plugs. LOL!! J/K of course! Getting a Fender tested or repaired might be tough over there too.

Not wanting to hijack the thread but we here in the US were taught a fairly short history lesson usually starting only about 400 years ago.
When you go to the Mediterranean area it boggles the mind how old things are.
I lived in southern Spain and drove on roads first built by the Romans around year One.
I was in the Navy and went on a weekend retreat that stayed in a monastery in Chipiona Spain, about 1/2 hour from the base where I worked. The monastery was obviously old but I had no idea. Found out that Ponce De Leon, that guy who looked for the fountain in Florida, had stayed at that exact same monastery. The marble steps everywhere were worn at least 2 inches in the center from many hundreds of years of foot traffic and I had placed my feet exactly in the same spot where he had walked. Boggles the mind.

My apartment was in the "old town" section of Rota Spain and the building was hundreds+ of years old. The builders didn't know to leave room for wires in the stone walls, LOL again!
The wiring was all external to the walls, the switches and outlets were stuck wherever they wanted them and nothing was grounded. I've seen the same in England, Sicily, Italy, Morocco and that whole area.

So I'm hoping the OP lives without grounded outlets and he can run a wire to some cold water pipes to ground the amp and any other electronics he owns. And I'm hoping that fixes his problem.

I hadn’t noticed he lives in Iran. That being said and while not knowing the local building code, his residence might be grounded fine. Tehran is the capital with over 8 million people so it’s likely more up to date on electrical grounding.

But I do get what you’re saying. When I was in Afghanistan the locals lived literally in mud and straw made houses like Jesus times. But the capital Kabul is a different story.

Hmmm... I’m guessing my earlier Last Will joke may not have translated. Anyway, hopefully he gets it all figured out.
 

old_internal

Electromatic
Mar 28, 2021
15
Tehran
Besides the guitar, it's possible that the amp isn't grounded properly. Try a different amp that has a grounded plug to eliminate this possibility.
Edit: looks we were all typing this at the same time.
Yeah, I think the amp is not grounded properly.
We have a Mustang V2, and have had received no shocks from it. If I did, I would get it repaired ASAP, these issues tend to get worse, not self heal. You are wise to be concerned.
As mentioned previously, it may be the guitar.
Did you plug in another guitar and have the same issues. Sometimes a cold solder joint on the guitar's ground circuit can give a similar problem.
Yep, I tested it with my other guitar and the same thing happened.
Have you all noticed what part of the world the OP lives in?
When I lived in Spain 40 years ago there was not one grounded outlet in my apartment. I had to run a separate wire (from water pipes) to ground my audio system, not a problem.

First I'd make sure your electrical outlet is grounded.

I remember the old days 50 years ago. My older brother Steve almost got electrocuted when he plugged in his Super Reverb in the garage and the outlet wasn't properly grounded. Correction: as I think about it now, I believe his amp only had a two-prong plug.
Yeah, here we use mostly type C plug.

The electrical outlet would be the starting place on the check list for that problem.. You should have 3 prong plugs, with a good earth ground and the hot & neutral lines on their correct pins.

Inexpensive electrical outlet testers can be purchased at most hardware stores. I carry one with me on all band jobs and have seen pictures of them posted here on GT. I had a picture of mine in my computer that I was going to post here but I can't find the picture....
Nope, here we use mostly type C plug.
Guys, he lives in Iran. I don't know if his local Ace hardware has outlet testers that fit his plugs. LOL!! J/K of course! Getting a Fender tested or repaired might be tough over there too.

Not wanting to hijack the thread but we here in the US were taught a fairly short history lesson usually starting only about 400 years ago.
When you go to the Mediterranean area it boggles the mind how old things are.
I lived in southern Spain and drove on roads first built by the Romans around year One.
I was in the Navy and went on a weekend retreat that stayed in a monastery in Chipiona Spain, about 1/2 hour from the base where I worked. The monastery was obviously old but I had no idea. Found out that Ponce De Leon, that guy who looked for the fountain in Florida, had stayed at that exact same monastery. The marble steps everywhere were worn at least 2 inches in the center from many hundreds of years of foot traffic and I had placed my feet exactly in the same spot where he had walked. Boggles the mind.

My apartment was in the "old town" section of Rota Spain and the building was hundreds+ of years old. The builders didn't know to leave room for wires in the stone walls, LOL again!
The wiring was all external to the walls, the switches and outlets were stuck wherever they wanted them and nothing was grounded. I've seen the same in England, Sicily, Italy, Morocco and that whole area.

So I'm hoping the OP lives without grounded outlets and he can run a wire to some cold water pipes to ground the amp and any other electronics he owns. And I'm hoping that fixes his problem.
Wow :D I think you have pretty wrong perspective about Iran LOL
But yeah our home doesn't have grounding and going to use the water pipes

Good point, but I would not make any assumptions on his living conditions based on location though. Clearly he has access and the money to afford a Gretsch. :)
LOL :D
 

Gretschtim1

Country Gent
Dec 4, 2012
3,629
Dundalk, Md
Besides the guitar, it's possible that the amp isn't grounded properly. Try a different amp that has a grounded plug to eliminate this possibility.
Edit: looks we were all typing this at the same time.
May I add - trying plugging the amp into another receptacle on a different circuit in your house. Sometimes a faulty ground in the wiring can cause this. If it still happens it's for sure a problem with the amp and should be checked out by a tech.
P.S. I didn't notice he was living in Iran but I would imagine he can use his multi-meter to check the receptacles for a proper ground.
 
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