Alternator won't charge right away - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 9 (permalink) Old 02-06-2007, 02:56 AM Thread Starter
 
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Alternator won't charge right away

I have a 95 PSD. the alterator won't charge right away. It can take anywhere from 5-10 miles before it starts charging. The gauge appears to me around 10-11 volts when it is not charging. and there is no battery light that comes on when this happens. Is this normal? Someone told me it had something to do with the glowplug system.
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post #2 of 9 (permalink) Old 02-06-2007, 03:15 AM
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Test it with a volt meter and see if your gauge is correct.
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post #3 of 9 (permalink) Old 02-06-2007, 03:55 AM
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Your voltage will be really low at startup while the glow plugs are running. They will run for quite a while after the engine is running. Once they turn off the volt gauge should shoot up to about 13 to 14 volts.

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post #4 of 9 (permalink) Old 02-06-2007, 04:45 AM Thread Starter
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Quote:
Originally Posted by racehauler
Your voltage will be really low at startup while the glow plugs are running. They will run for quite a while after the engine is running. Once they turn off the volt gauge should shoot up to about 13 to 14 volts.
Yes thats what I have been told. But should they be running for that long. like 10 miles. I heard that they shouldn't be runing that long.
It just seems to be an issue when some of my trips are under 15 miles, so that doesn't leave much time to charge?
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post #5 of 9 (permalink) Old 02-06-2007, 05:02 AM
 
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Quote:
Originally Posted by ScottyB
But should they be running for that long. like 10 miles.
Location: Buffalo, MN

Uh, yeah, they're gonna run that long...
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post #6 of 9 (permalink) Old 02-06-2007, 05:02 AM
 
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Mine does the same thing... It reads real low for a mile or so down the road then goes up to normal. Recently I had a problem. My stock alternator went bad and i replaced it with an after market one. The volt meter reads fine as long as the RPM's are up but as soon as i slow to an idle like at a red light it drops. My after market alternater is only a month old. I couldn't even jump start my lawn mower with out reving up the motor. I called the autoparts store and they said to bring it back in for an exchange. Wow...I hope I get a better one. Just because it's new dosen't mean it works. Ha Ha.
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post #7 of 9 (permalink) Old 02-06-2007, 05:08 AM Thread Starter
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Quote:
Originally Posted by FireHunter
Location: Buffalo, MN

Uh, yeah, they're gonna run that long...
Yeah, thanks for the weather update. its been like -15 in the mornings. But I haven't drove it for awhile.
Anyway it still does it when it is warmer out too. like 40 deg. And even if I turn it off and start it right back up again it will take another 5 miles for it to charge.
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post #8 of 9 (permalink) Old 02-07-2007, 02:18 AM
 
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Oh the weather is freezing here....It's like 64..65 BRRRR thats cold. I had to wear a long sleeve shirt today. Might even close the windows tonight before bed.
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post #9 of 9 (permalink) Old 02-07-2007, 03:18 AM
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Quote:
Originally Posted by HEAVYDUTY
Oh the weather is freezing here....It's like 64..65 BRRRR thats cold. I had to wear a long sleeve shirt today. Might even close the windows tonight before bed.

that's just not right. it was 8 below this morning and it's been snowing since 3:00 this afternoon. :

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