Headlights dimming and then going bright again - Page 5 - Dodge Cummins Diesel Forum
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Go Back   Dodge Cummins Diesel Forum > 3rd Gen. Dodge Cummins 03-07 Common Rail Forums > 3rd Gen. Powertrain
3rd Gen. Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect...NO ADVERTISING

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Old 01-06-2011, 05:16 AM   #49 (permalink)
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Hello

Really this is not a symptom of any major problem...
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Old 02-07-2011, 09:25 PM   #50 (permalink)
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mine does that to it kinda makes me mad i bought 2 new batteries and a new alternator still does it Lol
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Old 02-19-2011, 10:44 PM   #51 (permalink)
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wow that was an easy fix. Thanks
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Old 02-22-2011, 04:58 PM   #52 (permalink)
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so its the grid heaters? i have always thought that is the alternator kicking on and off to keep the load off the motor lol
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Old 02-23-2011, 06:16 AM   #53 (permalink)
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Yep... Just the grid heaters putting a big load on the electrical system
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The problem is that common sense isn't so common anymore...
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Old 02-26-2011, 06:59 PM   #54 (permalink)
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I've got a newbie question sadly, I've been borrowing the family diesel until recently when I bought my own and was curious about something.
I work 2 weeks in 2 weeks out in the Canadian North and the truck sits for 2 weeks in -30 celcius weather but is plugged in. Is it a problem if I don't start it and let it run a few minutes for those 2 weeks? Is there any problems that could arise or what?
Any help would be awesome!
Already learned a ton from the forums!
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Old 02-26-2011, 07:03 PM   #55 (permalink)
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As long as it's plugged In and better to keep out of the wind if possible you should be good!
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Old 02-26-2011, 07:13 PM   #56 (permalink)
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As long as it's plugged In and better to keep out of the wind if possible you should be good!
Thanks a ton man! I really appreciate it!
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Old 03-04-2011, 03:49 PM   #57 (permalink)
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Here is my question, I also had the dimming and the voltage drop when the heaters came on, Also my seat heaters (on cold mornings 45 degf or lower) would blink and not come on. I would have to drive a minute or 2 then stop shut the truck off, restart the truck before I could get the seat heaters to work. Do you think the switch is going bad?
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Old 05-22-2011, 09:52 PM   #58 (permalink)
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Whew glad to hear this! Just bought my '07 5.9 a week ago and I thought I was in for an issue!
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Old 06-17-2011, 04:43 PM   #59 (permalink)
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That sounds like your AC compressor cycling. Even with the AC button off, it will use the system on the defrost/defog settings. Normal.
Gotta just worship this site. Yet again here is a post answering a simple issue that i was gona ask a question on. Could never figure out why the A/C was working even tho it is switched off.

As i always have my heater set for your feet and the windscreen im guessing this answers my simple question
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Old 10-24-2011, 09:26 PM   #60 (permalink)
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On my 06 the voltage drops to about 9V when the heaters cycle on, and back to 14V when they cycle off, THEN the check engine light comes on.
I get the light turned off, but next time the heaters cycle on/off, the light come on again. What gives? Why does the engine light keep coming on, and how do i stop it?
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