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Digital multimeter LCD not diaplaying due to DC V appeared on resistance /buzzer port

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Did not mention what make and model is but it looks like input protection circuit is blown, will either have to be repaired or you need to purchase a new one depending on the price

Posted on Sep 25, 2013


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How do I check the coil on my 8n to verify it is OK?

A digital multimeter is required for testing the resistance levels of the ignition coil. The terminals of the coil are going to be marked "negative" and "positive," and these are the two points where the resistance of primary winding can be measured. Step 1: Prepare the multimeter
To check a 12 volt coil, set the multimeter to at least a 200 Ohms setting. Attach both leads of the meter to the coil-terminals with black to the negative terminal and red to the positive one.
Step 2: Test the resistance
The normal, acceptable range for a standard 12-volt car is 1.5 to 1.7 Ohms. See if the reading is within this range.
Step 3: Test the secondary coil resistance
Set the meter to 20K Ohm setting, and attach the leads to the ignition coil's center terminal. The reading for secondary-coil resistance should be 11, because if it is lower, that's the reason why sparks are not appearing

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1 Answer

How to check power supply

You can use this LCD Digital Ohm VOLT Meter AC DC Voltmeter Multimeter
LCD Digital Ohm VOLT Meter AC DC Voltmeter Multimeter

Or this Digital Amp Ohm Volt Meter Ac Dc Voltmeter Multimeter

Digital Amp Ohm Volt Meter Ac Dc Voltmeter Multimeter

or any other similar device..

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Can't get a accurate impeadance reading for my speakers using gmt 312

When you use a standard multimeter you are not measuring the impedance but the DC resistance, which is not the same. The DC resistance is typically lower than the impedance.
For measuring the impedance you need at least a sinewave signal generator and an amplifier.
If you are still interested, you can find good information here:
I hope this helps.

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Right side turn signals stopped working one day on my 1982 xj650, put in new flasher in and new bulbs and no change, If I need to do a resistance test on a voltmeter what do I need to do?.An explaination...

Hi dazsculpt,
I would start by checking the fuse for the right turning light. I think it is common for left and right. Check if the left turning light is working. If it is, you can use this as a reference.
Using a multimeter on your Yamaha is the same as using it elsewhere. The only difference is the setting you would use.
Two types of multimeters available are analog and digital. If you do not have a multimeter, I would suggest you purchase a digital.
A digital multimeter gives readings in numbers and is cheaper, whereas an analogue multimeter has a needle, and you have to read the correct scale.
Your multimeter will have instructions. There is a knob on the meter you turn to select the scale - voltage, ohms, amps, and maybe some extras.
The multimeter will probably have several ohm readings to select. You can select the lowest range for a start. Higher ranges measure very low resistance, and can even measure the resistance through your body!
Make sure that there is no power when you use the resistance measurement. Disconnect the battery on the Yamaha. It does not matter which way the leads are to measure resistance, it does for D.C. voltage, like your bike.
Remove both bulbs from the bike - left and right sides. There are two things to measure. The center of the bulb holder, and the housing of the bulb holder. Connect one leads to the center of the bulb holder should, and the other end on the flasher unit wire for that bulb. It should show a zero reading. Take another reading with the first lead still on the center of the bulb holder, and connect the other lead to the housing of the bulb holder. It should not show a reading, as this should be open circuit. If you have a reading, you will probably have a short circuit. Compare left with the right side, and there should be a difference.
Hope this has helped sort out the bike and use a multimeter.

Feb 03, 2014 | Motorcycles

1 Answer

Fluke 179 not working on voltage

possible blown fusible resistor (check for open or very high resistance - should be about 1kOhm) - first big resistor in Voltgae terminal circuit

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1 Answer

No panel display and no resistance on pedals

Check your power supply for DC voltage output. This link will help with instructions on how to check for DC voltage using a multimeter. Video about Multimeter Testing

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My Fluke 179 has stopped beeping (mode switch/continuity/range alert) Any way to fix this?

Needs new buzzer disc, or maybe buzzer disc fell out of its place and just repositioning it fixes the problem.

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1 Answer



Is this an Auto-ranging multimeter or does it have several range settings such as 2V, 20V, 200V, 750V, etc.?

If it is an auto-ranging, you will have 2 voltage selections: AC (alternating current) which will have a sine wave similar to this: ~, or DC (direct current) which will have a symbol similar to this: =. AC is mainly used to measure the voltage in your home or voltage to appliances, either 110V/120V or 220V/240V. DC is used to measure voltages such as in electronic assemblies, computers, etc.

You need to know whether you are measuring AC or DC to get an accurate reading. You also need to make sure you have the meter on a high enough range if it is not an auto-ranging meter. The best thing to do is start on a high range and work down, although most meters have an overload protection.

To measure current you must "open the circuit" and place the meter leads in the circuit. This should only be done if you are very familiar using the meter. Current is measured in Amps (A), milliamps (mA), or microamps (uA). There is little use for the common person to measure current.

Not sure what you are going to use it for. Computer power supply, perhaps?

There are some tutorials on youtube that may be beneficial. Here's one:

Here is another:

You can do a search once there for others. Just insert "multimeter" in the Search box.

Not sure if I have answered your request sufficiently, but if you have more questions, just use the Comment button.

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