You can test most electronic components to see if they’re working using a multi-meter. Just know the range of your component, the multi-meter setting, and how to use the multi-meter and you’re good to go.

 

1. Testing Resistors

• Set multi-meter to Resistance (Ω) Setting
• Connect multi-meter leads to both ends of component.
• IF meter reads a value within the component’s tolerance range (normally about 10%), then it is a good component.
• IF meter shows OL or a value outside the component’s tolerance range, then you should replace the component.

 

2. Testing Switches/ Push Buttons

• Do a continuity test by setting the multi-meter to Resistance (Ω).
• 1^st, test the “Off” position of the switch.
• 2^nd, test the “On” position of the switch.
• IF the meter reads 0 for the 1^st, and a value for the 2^nd, the component is good.
• IF the meter reads the same value for both tests, then you should replace the component.

 

3. Testing Cables/Wires

• Do a continuity test by setting the multi-meter to Resistance (Ω).
• Connect multi-meter leads to both ends of component.
• IF meter reads 0 Ω, then it is a good component.
• IF meter reads any other number, then you should replace the component.

 

4. Testing Diodes

• Remove component from the circuit.
• Set the multi-meter to the Diode Test setting.
• Connect multi-meter leads to both ends and record the reading.
• Reverse the leads and record a 2^nd
• IF meter shows OL in 1 direction, and a value in the other, then the component is good.
• IF meter shows OL or a value in both directions, then you should replace the component.

 

5. Testing Capacitors

• ALWAYS make sure the capacitor is fully discharged and removed from the circuit before testing.
• Set the multi-meter to the Capacitance Setting.
• Connect multi-meter leads to both ends.
• IF meter reads near the actual value, then the component is good.
• IF meter reads much lower than the actual value, or has no value, then you should replace the component.