# Multi Meter usage

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#### Raul27

Jul 30, 2017
10
Hey, I'd like to point out that I have never done anything with electronics before and this is my first time laying hands on the multi meter.

But the question is that can and how could I use the multi meter to find out if a single wire gives out any electricity, I will put 2 pictures here as well, one is of the tool and the other one is of the wire.

#### Harald Kapp

##### Moderator
Moderator
Nov 17, 2011
13,742
A single wire doesn'7 "put out electricity".
An electric voltage is always between two points (wires).
An electric current always needs a closed circuit, i.e. one wire leading from the powre source (e.g. battery) to the load (e.g. lamp), another wire leading back from the load to the source.

The supposed "single wire" in your first photo contains actally three wires:
- one to the tip of the connector
- one to the center of the connector (ring)
- one to the back part of the connector (sleeve)
The pinout is described e.g. here.

You could e.g. measure between ground and left or between ground and right, using the AC setting of your voltmeter in teh 2 V range.
It will help us understand your problem if you tell us what you want to accomplish.

#### Raul27

Jul 30, 2017
10
A single wire doesn'7 "put out electricity".
An electric voltage is always between two points (wires).
An electric current always needs a closed circuit, i.e. one wire leading from the powre source (e.g. battery) to the load (e.g. lamp), another wire leading back from the load to the source.

The supposed "single wire" in your first photo contains actally three wires:
- one to the tip of the connector
- one to the center of the connector (ring)
- one to the back part of the connector (sleeve)
The pinout is described e.g. here.

You could e.g. measure between ground and left or between ground and right, using the AC setting of your voltmeter in teh 2 V range.
It will help us understand your problem if you tell us what you want to accomplish.

What I'm trying to see is whether the radio I bought is broken or the wire doesn't give electricity, I have no luck yet seeing if the wire does actually give electricity.

#### davenn

Moderator
Sep 5, 2009
14,264
What I'm trying to see is whether the radio I bought is broken or the wire doesn't give electricity, I have no luck yet seeing if the wire does actually give electricity.

nother pic of a side view of the connector would help

what sort of cable is coming out of it ?
what does it connect to (the wire/cable)?

#### Raul27

Jul 30, 2017
10
nother pic of a side view of the connector would help

what sort of cable is coming out of it ?
what does it connect to (the wire/cable)?

Hey, it's the side pic of that cable.
The cable connects (powers) the shower's radio, but I'm not sure whether electricity comes through from that cable and that's what I'm trying to test with the multi meter, I hope you understand.

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#### davenn

Moderator
Sep 5, 2009
14,264
The cable connects (powers) the shower's radio, but I'm not sure whether electricity comes through from that cable and that's what I'm trying to test with the multi meter, I hope you understand.

OK I will try again .......

the cable that comes out of the plug ....
1) show a clear photo of it
2) where does that cable go to ?

#### AnalogKid

Jun 10, 2015
2,895
If you are saying that this cable comes from a power supply, like a small plastic box that plugs into a wall outlet, the plug on the end of the cable does not look correct for that. As above, post a photo of whatever the cable comes from.

ak

#### Harald Kapp

##### Moderator
Moderator
Nov 17, 2011
13,742
If that cable plugs intol the power supply (wall wart) with the plug shown, then you will not measure any voltage or current at the plug.
Again, give us a clear picture of the whole setup (power supply, cable, radio) so we can see what's going on.

#### FuZZ1L0G1C

Mar 25, 2014
366
Seems strange that the shower-radio uses a 3.5 mm stereo socket for DC and not a DC socket.
AC / DC wall-wart voltage being fed to earphone output, maybe?
If this is a modified setup where mini-plug is used as a DC source, put meter range on 50 volts DC (just past two o' clock), then place black tester lead on sleeve (longer back metal tube part of plug), then touch red probe tip to tip (front 'knob' part) of plug.
If nothing, try moving black to ring (middle of plug barrel).
If pointer needle does not move, or just barely, try lowering scale range to next lowest (10 V DC).
Pointer: Rather than 'wire', you should use the term 'cable' or 'power cord'.
'Wire' indicates one single wire only.
Your cable has two (I suspect it's from an old FM antenna).

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