Another voltage drop? - Page 2

RegenerationCompleted · 10-17-2009, 10:29 PM

Ditto on replacing batteries in pairs. I've heard the above story play out many times with only one battery changed.
Connections can produce similar behavior, but if they are cleaned and tightened properly while changing both batteries, chances are it will put this type of issue to rest.

Charlie

robinson2070 · 10-18-2009, 03:14 AM

haha yeah kenworth I'd say so, One more thing, this is kind of off subject but a buddy of mine told me that on a duramax that you can only jump off of one certain battery, (the left or right I'm not sure), but he said that if you jump off of the wrong battery it can harm your ecm and other stuff. Is there any truth to this?

__________________
08' 2500 6.7L CTD Laramie, Black, Automatic, mainly stock, EGR Unplugged, DPF/EGR gone!!. Straight Piped.

carisu · 11-02-2009, 08:55 PM

Cool, I had this same problem too with the voltage drop (not the engine shutting down on its own) and found this thread in a search. One more question though, once the engine is running and the grid heaters kick on will I see the light on the dash or does it not come on when the engine its running? Thanks!

__________________
2007.5 Dodge Ram 2500 Quad Cab 4X4, 6.7L Cummins, DPF, EGR, butterfly valve deletes, Edge w/attitude, B&W flip over ball

Espeefan · 11-03-2009, 03:13 AM

The heater grid symbol, on the dash, only lights up as the truck preheats the intake, just before start up. It won't come back on, after the truck is running, but you will probably hear the relay click on and off, you may see the lights dim a little, and you will probably notice a drop on the voltage gauge.

__________________
2001.5 Ram, 24 valve H.O. Cummins 6 speed manual, 4x4

2009 Ram, 6.7 Cummins, 6 speed manual, 4x4

inthenorth6.7 · 11-03-2009, 10:46 AM

"The other condition that will turn the grid heater off, is to engage the transmission and drive. "

mine still cycles while driving, lights dim etc.. is that abnormal then?

Espeefan · 11-03-2009, 12:19 PM

Quote:

Originally Posted by inthenorth6.7

"The other condition that will turn the grid heater off, is to engage the transmission and drive. "

mine still cycles while driving, lights dim etc.. is that abnormal then?

That isn't abnormal at all. Both of my trucks will continue to cycle the heater girds, even while driving. I've had the heater grid kick on, even after the truck is fully warmed up, and I've slowed down to about 20-30 mph, at lower engine RPMs. Quite normal.

__________________
2001.5 Ram, 24 valve H.O. Cummins 6 speed manual, 4x4

2009 Ram, 6.7 Cummins, 6 speed manual, 4x4

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10-17-2009, 10:29 PM	#13 (permalink)
RegenerationCompleted Cummins Enthusiast Join Date: Mar 2009 Posts: 262 Thanks: 4 Thanked 87 Times in 41 Posts RegenerationCompleted's Truck Pics	Ditto on replacing batteries in pairs. I've heard the above story play out many times with only one battery changed. Connections can produce similar behavior, but if they are cleaned and tightened properly while changing both batteries, chances are it will put this type of issue to rest. Charlie

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10-18-2009, 03:14 AM	#14 (permalink)
robinson2070 Cummins Fanatic Join Date: Sep 2009 Location: Corbin, Kentucky Posts: 134 Thanks: 11 Thanked 4 Times in 4 Posts robinson2070's Truck Pics	haha yeah kenworth I'd say so, One more thing, this is kind of off subject but a buddy of mine told me that on a duramax that you can only jump off of one certain battery, (the left or right I'm not sure), but he said that if you jump off of the wrong battery it can harm your ecm and other stuff. Is there any truth to this? __________________ 08' 2500 6.7L CTD Laramie, Black, Automatic, mainly stock, EGR Unplugged, DPF/EGR gone!!. Straight Piped.

11-02-2009, 08:55 PM	#15 (permalink)
carisu Cummins Fan Join Date: Sep 2009 Posts: 53 Thanks: 0 Thanked 6 Times in 2 Posts carisu's Truck Pics	Cool, I had this same problem too with the voltage drop (not the engine shutting down on its own) and found this thread in a search. One more question though, once the engine is running and the grid heaters kick on will I see the light on the dash or does it not come on when the engine its running? Thanks! __________________ 2007.5 Dodge Ram 2500 Quad Cab 4X4, 6.7L Cummins, DPF, EGR, butterfly valve deletes, Edge w/attitude, B&W flip over ball

11-03-2009, 03:13 AM	#16 (permalink)
Espeefan Cummins Nut Join Date: Nov 2006 Location: Wisconsin Posts: 342 Thanks: 25 Thanked 7 Times in 7 Posts Espeefan's Truck Pics	The heater grid symbol, on the dash, only lights up as the truck preheats the intake, just before start up. It won't come back on, after the truck is running, but you will probably hear the relay click on and off, you may see the lights dim a little, and you will probably notice a drop on the voltage gauge. __________________ 2001.5 Ram, 24 valve H.O. Cummins 6 speed manual, 4x4 2009 Ram, 6.7 Cummins, 6 speed manual, 4x4

11-03-2009, 10:46 AM	#17 (permalink)
inthenorth6.7 Newbie Join Date: Sep 2009 Location: B.C Posts: 11 Thanks: 2 Thanked 0 Times in 0 Posts inthenorth6.7's Truck Pics	"The other condition that will turn the grid heater off, is to engage the transmission and drive. " mine still cycles while driving, lights dim etc.. is that abnormal then?