The job of a resistor is to help control the amount of current in an electronic device, and its value is shown in colors. The numbered reading you get when using a multimeter can be converted to colors using a color code value chart.
Things You'll Need
Make sure the power is off for the device, including battery power. Any high-powered capacitors should be turned off as well.
Adjust multimeter settings to test in "ohms."
Put the multimeter's probes on each end of the resistor. Because it has universal polarity, the multimeter does not have to be disconnected and then attached to the other ends of the resistor a second time. One reading should be enough to gauge.
Take the multimeter's reading. The bands on the device should be read from the end to the middle.
Compare to the color code value chart. All the colors on the resistor mean something. The first two indicate resistance, the third tells how many zeros are next in the number and the final color indicates the tolerance.
Tips & Warnings
- The color code value chart is available in many places on the Internet. Multimeters can be purchased at big-box retailers. They come in both analog and digital.
How to Test for Continuity
Basics of continuity testing, including use of digital multimeters and dedicated continuity testers.
How to Use A Digital Multimeter To Test A Resistor
Digital Multimeters have many functions that are useful. One of the things Digital multimeters are very capable of performing is testing components....
How to Troubleshoot a Blower Motor Resistor
The most common symptom of a faulty blower motor resistor is a blower fan that only works on one speed, usually high....
How to Test Resistors in a Circuit
The resistor is a vital component found in almost every imaginable electronic circuit. It shapes the electrical signal as it passes through...
How to Test Multimeters
A multimeter is a tool that is used to take measurements of electrical circuits. No matter what type of multimeter you own,...
How to Test a Blower Resistor
All electrical devices contain circuits that channel current to perform various tasks. To limit the amount of electrical current flowing through a...
How to Check a Defective Resistor & Capacitor
Resistors and capacitors are basic electric components that are found in almost every circuit. All electric components have specific power tolerances, and...