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How can you tell if your alternator is going bad on your 04 honda lx 2.4 engine

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Test the alternator charging capability by connecting a volt meter to the battery terminals and starting the engine. The voltage should be at least 13 VDC.
If it's less it will not charge the battery enough.
Hope this helps.

Posted on Mar 29, 2015

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  • Honda Master
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Take out both battery cables. If the car stalls you alt is bad. Another way is on a auto part shop li pep-boys or auto zone, they will check it for free.

Posted on Mar 29, 2015

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SOURCE: how do i tell if my alternator or starter is going on my 1996 honda passport lx

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Posted on Mar 04, 2013

nobody322
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SOURCE: Honda Civic 2005 LX automatic 1.7L. Replaced battery and alternator. Battery light is showing. I am told either wiring is bad or a fusible link that goes to the starer then alternator. Help. Put on

why not use a 10 buck voltmeter take the readings and
see why, (alldata.com has the schematic)
look at the alt. first question we say to self is, is reg in alt or reg in ecu/pcm
now matter, meter black to body ground. battery minus best.
20vdc range
red test lead, battery + 12.6v, good, now the big stud on back of
alternator. 12.6. if not this line is open, (yes there is a fuse)
the fuse box,with big fuses, all are 12v on each end, if not that one is bad. not 12v.
now the alternator connnector.
1 pin is IGN, its 12vdc key if not, dash wiring.
2nd pin, charge lamp (battery) is tad less than 12vdc, thus its glowing key on,
next pin, if the tricky pin, the ecu charge wire. testing this is impossible with out real FSM on car.
the alternator case running must not read above 0v, or the alternator ground is bad.

i say a guy last year replace an alt 5 times
and the battery cables were bad.
the alt say the open and SHUT down.
i does that as a feature so as not to go way high voltage
and blow up every thing in car at 24volts. for sure.

i can get to my accounts, blocked on vacation in South america
seems is it eCU CONTROLLED
but they use lots of engines world wide, 1.7L not sure all are same. so i do FSM time. or alldata.com and look.

one good post is this, they stay on track , rare that.
no sure if you have a

http://honda-tech.com/honda-civic-2001-2005-78/battery-light-still-new-battery-new-alternator-plus-new-issues-3019040/

is your scan tool working??


ELD failure
is top of list. it controls charging,and is on recall for spikes blowing up expensive electronics,(random victims)

lots of posts world wide on ELD fails.





Posted on Jan 08, 2015

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I would check alternator, does the car stay running if you unplug the battery + after starting it? the car should stay running with alternator power alone if the car dies alternator is bad. if it does not you have to check ignition, fuel delivery or compression.

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