Question about Honda Civic

1 Answer

I have a volt/ohm meter and need to check the alternator output voltage on a 1988 honda civic. How do I do this

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 958 Answers

Put the meter in dc volts.in the range of at least 20 volts dc
.. put the red lead in the positive "+" terminal of the battery and the black lead to the negative "-" terminal of the battery.
start the engine and observe the voltage readings

if the alternator is charging fine, the reading should be 13.8 v dc or nearer...

turn on the ac, it should go down to at least 13 volts...
turn the head lights on, and you should have at least 12.5 volts....

if lower than the readings, try to rev the engine at 2000 rpm and observe again the readings,

if still low, you may have a faulty alternator.


i hope i was able to solve ur problem...

pls rate me

tnx..

drcool

Posted on Jul 26, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Battery drains while sitting


Hi Anonymous, perform the following tests:
1. Fill acid type batteries to proper levels.
2. Charge battery overnight at 1-2 amps you need 12.5 volts or better after charging.
3. Hook up battery positive cable, then with your multimeter on the milliamp scale connect one lead to the negative battery post and the other lead to the ground cable. Meter should read 3 milliamps or less, 10 milliamps with a radio, 15 milliamps with radio and CB. If your meter reads higher you need to isolate the circuit by pulling fuses and circuit breakers one at a time and observe meter for drop in aprerage then get out your test light and track down the short in that circuit.
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 while cranking 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.
17. For a free wiring diagram please visit the website below. Good luck and have nice day.
Harley Davidson Wiring Diagrams and Schematics

Jul 06, 2012 | Cars & Trucks

1 Answer

How often should the ignition coils be changed on a 2005 honda civic lx special edition? Thank you!


In ordinary use conditions, the ignition coils for your Honda should last a very long time--possibly the life of the car. It's not uncommon to see Hondas with their original coils at 125,000 or 150,000 miles--or more. New coils do put out a hotter spark than older coils, but in ordinary use, even an old coil should still be firing well within Honda specifications.

If your coils are getting fried early (meaning, a lot earlier than what I just wrote), you might want to check the voltage going to them. Too high voltage will burn them out prematurely. That, in turn, could be caused by a malfunctioning voltage regulator, and that same overly high voltage could also be burning out your bulbs and headlights prematurely, as well as possibly damaging your sound system and on-board computer.

When running, your car's electrical system should not be exceeding 14.5 volts. More than a few cars are designed to max out around 14 volts. Make sure that you check output voltage at several engine speeds, such as at idle, at 2000 rpm, at 4000 rpm. You might notice some variation depending on engine speed, but a good voltage regulator will do its best to keep output voltage consistently over 13 volts. Some Honda alternators and voltage regulators are designed to cut back on output voltage at low RPMs, i.e., when idling or just bopping around town. That would tend to give you a seemingly low reading, like a battery's own 12.6 volts; it would not give you a reading that's too high.

May 16, 2011 | 2005 Honda Civic

1 Answer

Check engine light comes on and voltage gage drops below 9 volts, the battery gets drained in the process, battery is not charging. Checked the alternator and it checks out good.


There may be a no charge state in this case, or internal issues with your battery. I recommend checking the charging system and its corrosponding parts/sectors. Use the procedure below to isolate this issue.


Wear protective eye wear and clothing and remove all jewelry when checking your battery and charging system. Jewelry is a good conductor of electricity and is not recommended. Most batteries wear out every 3 to 5 years and need to be replaced. Always replace your battery with an equal replacement battery to assure proper operation. Automotive batteries have a +positive terminal (red), - negative terminal (black). Electricity is stored in the battery and then supplied to the vehicle when the engine is not running. While the engine is running the vehicles alternator charges the battery for future use. (Note: never disconnect the battery while the engine is running. If the battery cable is disconnected from the battery a spark can be generated which can cause the battery to explode or a major electrical malfunction to occur.)


To check a battery surface voltage, remove the positive terminal protective cover. Connect the +positive side meter lead (red) to the positive side battery terminal. Connect the - negative (black) side meter lead to the negative battery terminal. With the vehicle not running and the car sitting over night the battery voltage should be between 12.5 and 12.8 volts.(You will need to use a voltmeter for this testing procedure)


The alternator is rotated by a drive belt driven by the vehicles engine while it is running. Electrical voltage and amperage are generated to recharge the battery and supply voltage to the electrical system of the car. The alternator is held in place with mounting bolts. There is a main electrical wire on the rear of the alternator that supplies voltage to a main voltage junction box. If your alternator is not charging properly, your battery will slowly drain down from operating all the electrical systems in your car and stop the car from running.(most non charge states will be the cause of a loose belt or a low tension rate, due to a mis-adjusted alternator. make sure you have enough tension in the belt for full rotation of the alt pulley)


Next, you will need to check the alternators output with the Amp meter.

Testing the amperage output of the alternator is good for measuring the amount (not the level) of voltage the alternator can produce. This test can be tricky because if the alternator is weak it can still show it as producing amperage. Which is good, but if the voltage is low, it will still allow the battery to go dead. To check the amperage output of an alternator an amp meter is needed. Once the meter is connected start the engine. Next turn on all electrical accessories and raise the engine idle to about 1200 RPM. The alternator should output the max amperage it was designed to produce. Example: a 90 amp alternator should output about 88 amps. Note: An alternator cannot sustain maximum output for long periods of time. If the alternator is forced to operate at maximum output it will overheat and fail. An alternator is designed to operate at max amperage output only for a reasonable amount of time.

((Connect the voltage meter lead the same way you would in a battery static voltage check, Start engine (do not drive) at engine idle the voltage should be between 13.6 to 14.3 volts. If not the alternator may need replacing.)))

Apr 23, 2011 | 1996 Jeep Grand Cherokee

3 Answers

How to check truck altornator


start engine unhook positive cable if it dies its bad alternator or fuesable link between batt and alternator also a volt meter will tell u if its charging a good alternator will charge 13.50 to 14 volts

Mar 18, 2010 | 1988 Chevrolet C1500

2 Answers

Lights blinking


Sounds like you may have bad battery make sure your battery is getting the charging voltage of 13,8 volts or higher check it with a volt meter and see if the alternator is working right I've gotten bad alternators one can never be to sure than elminate that problem and move onto the battery make sure its good. it should have 12.6 volts or higher after it has been fully charged or you think its charged . than last check your relays and your fuses make sure there all working good luck

Sep 24, 2009 | 1998 Honda Civic

1 Answer

Voltage problem on 91 Buick Park Avenue


sounds like the voltage regulator is not working, at the terminals you tested voltage should be above 13.6,also make sure you have good grounds,these should be tested with an ohm meter,meter should read zero,no resistance, if you need more help get back to me and we'll do some other tests,please rate my fix as i strive to be the best

May 13, 2009 | 1991 Buick Park Avenue

1 Answer

Dying Alternator Honda dx 99


first of all since you have a hand held i figure you have a volt meter. locate battery wire to the back of your alternator while eng running test output voltage of alt. if less than 13.25v replace ( not with a autozone unit ) actually it should say 14.-16.v im glad you had your battery load tested. lets fix the charging system first of all at that point we will go from there.

hope2help shack

Apr 17, 2009 | 1991 Honda Civic

1 Answer

The battery light is on what does that mean


generally, the battery lite will come on due to a charging problem. 1st ck to make sure belt is on and tight. 2nd if you have volt meter, with vehicle running, ck voltage at battery terminals. should be over 13.5 volts, if not, verify there is 12 volt supply to large red wire at alternator. if there is voltage at alternator, but less than 13.5 across battery with it running, replace alternator

Nov 18, 2008 | 1990 Honda Civic

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

144 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honda Experts

yadayada
yadayada

Level 3 Expert

60541 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21927 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

Are you a Honda Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...