Technique: Testing Power Cord Continuity

Student-Created Guide

Student-Created Guide

An awesome student from our education program made this guide. It is not managed by iFixit staff.

How to determine if your electronic device's power cord is in working condition.

  • Author: dmchan
  • Time required: 1 to 5 minutes
  • Difficulty: Very easy

A detailed guide on how to use a continuity tester to check for adequate electrical connection on a power cord.

Edit Step 1 Testing Power Cord Continuity  ¶ 

Image #1

Edit Step 1 Testing Power Cord Continuity  ¶ 

  • Unplug the power cord from the game console and from the AC outlet. Failure to do so can result in electrical shock or death.

  • Set the multimeter to continuity test mode.

  • The setting is symbolized by a "volume indicator" as seen in the picture. If the meter is set to the correct mode, you should hear the meter beep when the leads are touched together.

  • Verify that the positive lead is plugged to the voltmeter/ ohmmeter outlet.

Edit Step 2  ¶ 

Image #1

Edit Step 2  ¶ 

  • Test for a potential open circuit by using one multimeter lead to touch one of the prongs on the AC side of power cord. Use the other lead to touch one end of the console side of the power cord.

  • If there is an adequate electrical connection, the multimeter will beep. If it does not beep the first time, try using the lead to touch the other prong.

  • Repeat the above directions in step 2 for the other outlet and prong of the power cord.

  • If the multimeter fails to beep on any of the occasions outlined above, your power cord is open. In other words, you will need to replace the power cable.

Edit Step 3  ¶ 

Image #1

Edit Step 3  ¶ 

  • Once you have verified that the power cord provides an adequate electrical connection, you will have to test that the cable is not shorted.

  • Test for a potential short circuit by touching each prong on the AC side of the power cord.

  • If the multimeter beeps, your power cord is bad and must be replaced immediately.

  • If your power cord is shorted, do not attempt to replug the cord into the AC outlet.

  • If your power cord has passed all of the steps above, then you have successfully tested that your power cord is in working order.

For more information, check out the Electronics Skills device page.

Required Tools

Digital Multimeter

$24.95 · 50+ In stock

Popular Products

Unibody Laptop Dual Drive

$39.95 · 50+ In stock

iPhone 4S Display Assembly

$34.95 · 50+ In stock

iPhone 5c Replacement Battery

$24.95 · 38 In stock

T6 Torx Screwdriver

$9.95 · 40 In stock

iFixit Lock Pick Set

$14.88 · 50+ In stock

Comments Comments are onturn off

Great Article,you can use a little bubble to let electric current light the bubble,make sure use the correct voltage of ,Example ,if you are in Europe,then you need to use 220V Europe power cord http://www.yunhuanelectric.com/Europe-po... to test.

huaiancg, · Reply

Thank you very much.

Kaky Jerry, · Reply

Wow Wow Just a Great Guide, Now I have learned one more skill :)

Muhammad Imran, · Reply

View Statistics:

Past 24 Hours: 34

Past 7 Days: 234

Past 30 Days: 1,467

All Time: 39,962