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Engine runs but only puts out 13 volts - Electrical Supplies

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Probably the alternator since most and i say most because yu did not include the make model or year of your vehichle,has the voltage regulater in the alt

Posted on Nov 03, 2012

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Said alternator was bad


Bad alternator means no battery charge. Run the battery down without a charging means no power and engine will die. Charge the battery and put a meter on it to see if it goes to 14 volts with engine running. If stays under 13 volts with engine running, replace the alternator.

Sep 25, 2014 | 2001 Mercedes-Benz CLK-Class

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What or how does the battery get its charge


Most bike have an alternator driven off the left-hand crankshaft shaft.
This turns with the engine, producing the AC charging power.
This power then runs through a voltage regulator, that both converts the the AC voltage into DC voltage, and regulates the amount of voltage flowing into the remaining electrical system.

Now, you did do the first step correctly.
DC volt meter to battery terminals to see if you get 13-14 volts DC with engine running.
Next, locate voltage regulator and unplug connector for wires coming FROM the regulator, and hook up the DC voltmeter.
With engine running, you should have 13-14 (or so) DC volts.

If not, locate and unplug wires coming from alternator to regulator, and hook up AC (note change from DC to AC) voltmeter.
With engine running, should have AC voltage (this could be 20-40 volts or more).

This will let you know where the problem is, and what needs to be replaced.

Apr 25, 2014 | 1993 kawasaki KLE 500

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89 Yamaha virago 750 while riding lights go dim and engine cuts out unless bike is revved up then engine runs and light come back (sometimes) what's the problem?


You have a charging fault, it sounds like 1 phase of your alternator is down , so giving a low charge rate check in this order.
alternator winding resistance at the plug/ skt into the regulator and,or reg/ rectifier unit
the plugs clean and connections good.
next the out put voltage which should be about 13-14 volts just above idle, lights off, rev engine up to 2-3 thousand revs voltage should be 14.5volts,turn on the lights voltage should not drop to under 13 volts with the engine above 2k rpm.
low charging rates are normally down to alternator and wiring issues not the regulator which if faulty wil give no out put , so no chage at all

Jan 14, 2014 | Motorcycles

1 Answer

Lights flicker and batt has been going dead


alternator fault check with a meter but would say the bushes inside have worn out. cheaper to replace the hole unit. put meter on battery with out engine running nothing on. should be a round 12.05 volts. then test again with engine running no lights should be around 13-14 volts fairly steady if it is jumping all over the place then it is defo the altinator. .

Oct 15, 2013 | 1999 Pontiac Montana

1 Answer

WHAT SHOULD THE VOLTAGE BE FOR 2000 BUICK 3.8L ALTIATOR


Voltage at the battery or alternator with the engine running should be 13 to 15 volts. Engine off would be 12 to 13 volts depending on the condition of the battery.

Feb 10, 2013 | Cars & Trucks

1 Answer

I dont think my yamaha gas powered golf cart is charging properly. How can I trouble shoot this problem?


With the engine running at about half power/speed, put a volt meter across the battery terminals. The meter should read somewhere around 14.5 volts. If it is below 13 volts it is definitely not charging. Consider that the battery, unless new, could also be failing.

Apr 16, 2011 | Yugo Hatchback Cars & Trucks

1 Answer

I replaced the alternator and the battery on my 2005 equinox...battery light stays on...how can i turn it off?


There's no reset for a battery light (alternator), check voltage at battery with engine running, that will be alternator out put voltage, should not read less then 13 volt's, also check voltage at back of alternator, on the big wire, should have no less then 13 volts also, if voltage is less then 12.6 volt's there, bad alternator, will have to be replaced again, if voltage is good there, but not good at battery, check for bad fuse or fuse link, hope his was very helpful.

Aug 27, 2010 | 2005 Chevrolet Equinox

2 Answers

Need to test alternator in a 2008 camry


Hi.

Get a multimeter and read Volts across the two battery terminals.

With engine off it should read about 12.5, by turning on the engine and revving i up a bit it should read about 13.5/14 Volts. If voltage remains unchanged, then the alternator is not working.

Aug 20, 2010 | Toyota Camry Cars & Trucks

1 Answer

My battery light and engine light came on while riding, what could be issue?


I would check the charging system on the bike. With the battery at full charge, start the bike and measure the voltage at the battery. Use a DVOM (digital volt ohm meter) and put the red probe on the positive terminal and the black probe on the negative terminal of the battery. Put the meter in DC volts 50 volt range. When you rev the engine a bit, you should read 14.5 - 15.0 volts. If you're reading under 13 volts with the engine running, your charging system had gone out.

May 22, 2010 | 2006 Harley Davidson XL 1200 C Sportster...

1 Answer

Toro 20045 Mower will not start. Battery is putting out 13 volts and all I get is a slight grown.


While the battery may be putting out 13 volts...it may not be putting out enough amps to turn the engine over...try charging/replacing the battery.

Apr 19, 2009 | Garden

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