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Old 12 Jan 2008, 11:43 pm
Stan
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Default Strange electrical problem

I have a 2002 Honda civic dx. As the engine is revved up, the lights dim
and the heater fan output actually decreases. This happens whether the car
is driven or at a stand still and the engine is revved. Alternator belt is
tight, battery post are clean. Can anyone suggest what the problem might be.


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Old 14 Jan 2008, 02:06 am
Michael
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Default Re: Strange electrical problem

Stan wrote:
> I have a 2002 Honda civic dx. As the engine is revved up, the lights dim
> and the heater fan output actually decreases. This happens whether the car
> is driven or at a stand still and the engine is revved. Alternator belt is
> tight, battery post are clean. Can anyone suggest what the problem might be.
>
>

I don't know the problem, but I have the same thing in a 1998 CRV. Honda
must be doing something weird.
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Old 14 Jan 2008, 11:44 am
motsco_
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Default Re: Strange electrical problem

Stan wrote:
> I have a 2002 Honda civic dx. As the engine is revved up, the lights dim
> and the heater fan output actually decreases. This happens whether the car
> is driven or at a stand still and the engine is revved. Alternator belt is
> tight, battery post are clean. Can anyone suggest what the problem might be.
>

--------------------

The belts on newer cars need to be WAY tight compared to 30 years ago.
Search for 'honda ELD' to understand a lot more. Try www.tegger.com and
search there.

'Curly'
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Old 15 Jan 2008, 08:31 pm
Tony Harding
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Default Re: Strange electrical problem

What the hell is it with this crap - it's all over the NG?
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Old 19 Jan 2008, 02:45 pm
bi241@scn.org
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Default Re: Strange electrical problem

On Jan 12, 11:43 pm, "Stan" <sderegow...@shaw.ca> wrote:
> I have a 2002 Honda civic dx. As the engine is revved up, the lights dim
> and the heater fan output actually decreases. This happens whether the car
> is driven or at a stand still and the engine is revved. Alternator belt is
> tight, battery post are clean. Can anyone suggest what the problem might be.


It seems like your engine electrical lives off the battery when that
happens. You can do a quick and simple test with a multimeter. A
working charging system should read at least 13.5V (but no more than
14.5V) when the engine is running. If not then it may be a bad voltage
regulator, a faulty rectifying diode pack, or a bad ELD sensor.

i have no experience with ELD system. i only know that in newer
Hondas, the ECU turns off the charging system whenever it deems
neccessary to reduce load on the engine and therefore to conserve
fuel. In your case a bad ELD sensor may be the culprit. Do you see
the "Check Engine" light on?

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