How to measure resistance with an ohm meter?
Ohms are typically symbolized by the Greek letter omega. The easiest way to measure resistance in a circuit is to use an ohmmeter or a multimeter. Most electricians will use a multimeter as it allows them to measure different things with the same instrument.
What does it mean when a fuel injector meter reads infinite resistance?
Probe the injector electrical terminals—polarity doesn’t matter. A resistance reading other than the specified in your service manual means you need to replace the injector. For example: If your meter reads infinite resistance, it means the coil in the injector is opened.
How do you test the resistance of an injector?
You will need a voltmeter to check resistance through the injector. Fuel maybe present during testing so the usual fire precautions are necessary. Use protective gloves and eye wear for safety. Test for FI systems only. Observe audible clicking confirming injector operation Test the coil windings resistance using a volt meter
What should the Ohm reading be on a fuel injector?
Connect the voltmeter leads to the terminals, the polarity of the leads is irrelevant. This test gives a baseline ohm reading of all injectors, a service manual also has this information. Most injector readings should range between 11 and 24 ohms.
How to check fuel injector resistance with a multimeter?
Learn how to check fuel injectors to make sure they are working. You use a multimeter on the resistance settings and measure the ohms of the injector. All injectors should be within .5 ohms of each other. If an injector is out of the resistance specification, that injector is bad.
Connect the voltmeter leads to the terminals, the polarity of the leads is irrelevant. This test gives a baseline ohm reading of all injectors, a service manual also has this information. Most injector readings should range between 11 and 24 ohms.
What should the resistance of an ohmmeter be?
For example, if you expect the circuit you’re measuring to have a resistance of 1100 ohms, then your ohmmeter should be set to X100. This means, a reading of “11” on your ohmmeter would be equal to 1100 ohms. Note that you can only do this if you have an idea of what the resistance of what you’re measuring ought to be.
What is the resistance of a low impedance injector?
Low impedance injectors are found on high performance and larger injectors. They have much lower resistance, typically around 2-5 ohms. Step 5: Repeat with all injectors. They should all have a resistance within half of an ohm from each other. Any major difference and that injector should be inspected to make sure that it is firing correctly.