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ozjason Offline
#1 Posted : Tuesday, 28 August 2007 7:36:25 PM(UTC)
ozjason

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Hi,

Something Ive noticed while driving at night. My charge light on the HQ ute glows ever so slightly while running at night with stereo and high beam on. It's soooo faint I can barely see it. But it is on. Can only see it at night. If I turn high beam and stereo off, it does seem to disappear. The light comes on fine and bright when the engine is off, but key is on, so I'm convinced that the bulb is fine.

Battery doesn't go flat, always heaps of start...

Is this just normal and I haven't noticed it before? Or is it the first sign of a problem? Alternator is only a few years old.

Cheers,
Jason.
keithholden Offline
#2 Posted : Wednesday, 29 August 2007 3:09:20 AM(UTC)
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Put a multimeter accoss your battery while car is going and see what charging volts you are getting maybe then turn these things on and see what it says. I think from memory it should be 14volts> you could try another car to compare difference.

If
If its not broke it will be soon
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#3 Posted : Wednesday, 29 August 2007 4:22:23 AM(UTC)
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Finally one I might know the answer to. Years ago my kingswood did the same thing, turned out to be a faulty diode in the alternator, because the alternator produces only ac voltage, the diode pack rectifies this into d.c to charge the battery. When these
adam PERTH Offline
#4 Posted : Wednesday, 29 August 2007 4:31:40 AM(UTC)
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this often happens after young punks start their cars with a good batt, leave the car running, and put another battery in and connect terminals, all while the car is running.
blows the diode apparently.

A1 Bogan.
Old holdens brought on the spot, quick decision, cash paid.
johnperth Offline
#5 Posted : Wednesday, 29 August 2007 8:57:06 AM(UTC)
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I had the same problem regardless of which alternator or battery it was running, had brand new 85amp alternator still did it, I suspect it was something to do with earths.
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#6 Posted : Thursday, 30 August 2007 7:47:35 AM(UTC)
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Hi Phil,

Your theory about diodes is close but not accurate... The diodes form a bridge rectifier basically a diamond shape of diodes...that converts the alternating current to direct current.

My alt light on my hq USED to glow dimly also & I know t
ozjason Offline
#7 Posted : Thursday, 30 August 2007 6:15:00 PM(UTC)
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Thanks everyone - certainly some places to start. Ill check out the alternator output, it may be suspect. Monarq - youre saying it turned out your system was working fine?

Jason.
ozjason Offline
#8 Posted : Thursday, 30 August 2007 6:15:00 PM(UTC)
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Thanks everyone - certainly some places to start. I'll check out the alternator output, it may be suspect. Monarq - you're saying it turned out your system was working fine?

Jason.

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#9 Posted : Friday, 31 August 2007 7:11:52 AM(UTC)
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Correct...
basketcasebear Offline
#10 Posted : Friday, 31 August 2007 8:38:52 AM(UTC)
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hey all.
my light glows, but it is because something iswrong in the wiring? which i have no idea, and it is something i did, my question is, i put a speco volt meter init, and wired it in directly, to ignition, which is also directly wired into battery,
more than basketcase than a bear!
DOH!!!
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#11 Posted : Sunday, 2 September 2007 6:19:55 PM(UTC)
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The brushes in your altenator are wearing out I reccon.
Same thing happened to mine.
Buy a set of brushes and replace them . . . . $10
Intoit Offline
#12 Posted : Sunday, 2 September 2007 7:28:32 PM(UTC)
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I agree with RigPig, Check the brush length.

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