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Which setting do i put the DM7 wavetek meter on to read a 12 volt battery to get how many volts it has

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Set it on the lowest dc volt setting that is above 15 volts.Make sure that you observe polarity when you test to protect your meter. I'm not sure if this meter has a built in protection to cover it if you hook it up backwards. Thank you

Posted on May 25, 2011

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How to check charging system on a kohler 17.5


This is an easy check if you have a cheap, simple volt meter. It's much better to have an old fashioned needle meter rather than a digital. The needle is more sensitive, much quicker, and makes a clearer diagnostic tool. But not to worry, for you fancy folks a digital still works (sometimes the results are not as clear).
  1. Set the meter to DC Volts.
  2. Attach the red and black leads of the meter to the positive and negative posts of the battery. Most modern day digital meters don't care if the polarity is correct or not. However, if you have a needle meter, best to put the positive of the battery with the red wire of the meter; otherwise the needle will not be happy with you.
  3. Note voltage. It should read near13 volts if the battery is good and fully charged. If it reads below 12 volts it needs charged or it has bad cells. If after charging a few hours, the voltage is still below 12 volts then the cells are bad, replace it.
  4. Turn the key to crank the engine while keeping your eyes on the meter. Whether the engine cranks or not, the meter should not fall much below 11 Volts. If it falls below 10 volts or worse yet below 9 volts, the battery has a bad cell or two. Replace the battery, charge it, and repeat the test.
  5. If the engine starts, rev it up and watch the meter.
    1. If the charging system is working the voltage on the meter should quickly rise above 13 or 14 volts.
    2. If it rises up strongly towards the 14 volt range this indicates the charging system of the machine is working.
    3. If it plays around down near 12 volts you are reading the recovered voltage of a good battery, but the charging system is not working.
    4. If it simply stays below 11 volts, the battery and the charging system are both suspect. Replace the battery first. Fully charge it, and then repeat the tests before worrying about the charging system.
Note:if the battery falls below 9 volts the fuel cut off, a black cylinder on the bottom of the carburetor (if your model has this), will cut off the gas supply to the carburetor.

Mar 15, 2015 | Garden

1 Answer

How can I check charging system in scooty pep+


The normal way is locate the battery, using a multi meter set to 20 volt DC check the volts across the terminals, if your battery is 12 volt the reading should be at least 12.5 and at most 13.5. If 6 volt the reading will be somewhere between 6.5 and 7.5 volts. Remove meter, start the engine, connect the meter back to the battery keep it set to DC and 20 volt. Note the meter reading at tick over and slowly increase the revs the voltage should rise to about 14.4 volts for a 12 volt system and maybe 8 volts for a 6 volt one. If volts to not rise then check regulator/rectifier, if OK check alternator.

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1 Answer

How do you test charging system on 1998 cadillac


You need a volt meter. buy one at harbor freight if you do not have one. usually about $5.00 Set the selector switch on the meter at DC 20V There ae 2 wires/Leads that come off the meter a red one and a black one. Put the black one on the NEG - battery terminal. Put the red lead on the POS + battery post.. with the engine off it should read about 12 volts.. with the engine running it should read 14 Volts or better.. If it does not increase to 14 volts or so the charge is not getting to the battery.. could be as simple as a loose fan belt or a bad alternator, or a short in the wire between the alternator and the battery. let me know what you find..

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1 Answer

Charging system failure low voltage


Hi Anonymous, perform the following tests:
1. Fill acid type batteries to proper levels.
2. Charge battery overnight at 1-2 amps you need 12 volts or better after charging.
3. Make sure all connections are clean and tight especially the negative cable at both ends.
4. Hook up volt meter to battery and start engine, if meter falls below 9.5 v replace battery.
5. With engine running at 3600 RPM battery should read 14.3-14.7 volts if not continue tests.
6. Unplug voltage regulator from alternator at crankcase by front of primary cover.
7. To test voltage regulator go to: https://www.youtube.com/watch?v=F8EjV0IjW9Q
8. With ohm meter, one lead grounded, touch alternator pin meter should read infinity, if not replace stator.
9. With ohm meter, both leads touching alternator pins meter should read 0.1 to 0.2 ohms on 1989 and later models. 0.2 to 0.4 ohms 1988 and earlier models, if not replace stator.
10. With volt meter set on AC scale, both leads touching alternator pins meter should read
16 to 20 volts AC for every 1000 RPM'S 1989 and later and 19 to 26 volts AC for every 1000 RPMS. If not replace rotor. Good luck

Jan 07, 2014 | 2011 Harley Davidson FLHTK Electra Glide...

1 Answer

1998 heritage softtail battery going dead


Hi Anonymous, perform the following tests:
1. Fill acid type batteries to proper levels.
2. Charge battery overnight at 1-2 amps you need 12 volts or better after charging.
3. Make sure all connections are clean and tight especially the negative cable at both ends.
4. Hook up volt meter to battery and start engine, if meter falls below 9.5 v replace battery.
5. With engine running at 3600 RPM battery should read 14.3-14.7 volts if not continue tests.
6. Unplug voltage regulator from alternator at crankcase by front of primary cover.
7. To test voltage regulator go to: https://www.youtube.com/watch?v=F8EjV0IjW9Q
8. With ohm meter, one lead grounded, touch alternator pin meter should read infinity, if not replace stator.
9. With ohm meter, both leads touching alternator pins meter should read 0.1 to 0.2 ohms on 1989 and later models. 0.2 to 0.4 ohms 1988 and earlier models, if not replace stator.
10. With volt meter set on AC scale, both leads touching alternator pins meter should read
16 to 20 volts AC for every 1000 RPM'S 1989 and later and 19 to 26 volts AC for every 1000 RPMS. If not replace rotor. Good luck

Sep 08, 2012 | Harley Davidson FLSTC Heritage Softail...

1 Answer

Hello i have a 1990 harley davidson softail custom,i've own it for 20 years,i don't think its charging,battery is fairly new when its running and i remove the ground cable it stops dies out i put a test...


Marshall:

First, your battery MUST be fully charged to perform these test. You'll need a good DVOM (digital volt ohm meter) but an analog meter will work. Connect the meter across the battery with the read lead to the positive post and the black meter lead to the negative post. Put the meter's function switch in DC VOLTS, 20 VOLT range. Start the engine and bring it to a high idle. Your meter should show a slow build up of voltage over about a thirty second period of time. It should read 14.5-15.0 volts.

If not, you'll need to test the alternator. Unplug the regulator at the front of the engine. Look inside the connector in the engine case and you'll see two metal connectors. Put one meter lead into each contact. It makes no difference which lead goes to what connector because we're checking AC voltage. Now, set your meter function switch to AC VOLTS, 50 VOLT RANGE. Start the engine and bring it to high idle. You should read at least 30 volts.

If you read 30 volts or more at the alternator but less than 14 volts at the battery, replace the regulator. Naturally, less than 30 volts at the alternator, replace the stator.

Good Luck
Steve

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1 Answer

I have a 2003 1200 custom it just clicks when trying to start, ive cked the battery & cleaned the battery cabeles on both ends ,if u just bump starter switch motor will turn over for a second but...


Do not use the 200 amp start mode on your bike. You'll mess up a lot of electronic stuff doing that. It sounds like your battery is bad. Take a volt meter and connect it to the battery. Red lead to positive, black lead to negative. Set the meter to DC VOLTS, 20 VOLTS scale. It should read just over 12 volts, about 12.3 volt usually. Now, hit the start switch and watch the meter. If it drops below 11 volts, your battery is bad. You say you had it tested. Did they just put a meter on it or did they load test the battery? Just putting a meter on the battery without a load on it tell you nothing about the condition of the battery. If your battery is over two years old, you probably need a new one. What you have an intermittent short inside the battery.

Good Luck
Steve

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1 Answer

96 ford taurus, altenator was burning up and I replaced it, now I have a steady battery light on, put second altenator in and same problem


Most likely the battery has a short in it,but let us check it out,use a volt meter,and attach it to the battery,start the engine up,and turn the head lights on,and the ac on high blower setting.The reading on the volt meter should be 13.65 volts to 14.25 volts,if the voltage is below the 13.00 volt mark,this is the reason the light is on,so...replace the battery.If the volt meter only reads 12 volts,or a little higher,or lower,then the alternator is not charging the battery,with the key off,check the volts at the alternator,on the large wire,this is the output ,it should read 12 volts,or there about,if it reads nothing ,or let`s say 5 ,7 or 8 volts,then the wire is bad,replace it,using a wire as beg,or larger(larger is better) to attach with the wire that is already on the alternator,and run it to the positive side of the battery,this will get voltage to the battery.If this is at all helpful,please rate,thank you.

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1 Answer

My 2000 grand marque has a low charging rate. The battery runs down after driving for a while. the air bag lite comes on after a while.


Take a volt meter and put the test leads on the battery terminals,
red to positive,
black to negative,
set meter to 12 volts dc
If the meter reads less than 14 to 15 volts dc, the alternator is not charging and needs a new one.

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1 Answer

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A 12 volt battery is actually 13.2 volts fully charged. If you are reading 16 volts, you are probably getting extranious voltage from the system somewhere, especially if the vehicle is running when you check the voltage. The alternator will put out about 15-18 volts to charge the battery normally, and yours may put out 28-32 volts to charge them in series, but the batteries, when disconnected, should never read more than about 13.2 volts each. Typically, it will read about 12 1/2 volts when disconnected. COMPLETELY DISCONNECT BOTH OF THE BATTERIES. If you still read 16 volts when it is disconnected, you must have a bad meter because the battery can't produce that much voltage, no matter what. (Six 2.2 volt cells connected in series inside the case.) Put the meter on a known good battery on another car that is not running and see if you get the same reading. It sounds like the other battery is almost dead, regardless, and it sounds like your series/parallel switch may be malfunctioning. (That is the switch that puts the battery in series to run the 24 volt starter, then puts the batteries in parallel to run the remainder of the vehicle on 12 volts. This is all assuming that you have a diesel vehicle with a 24 volt starter and that is why you have two batteries.

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