Electrical Problem

mitymopar · 10-27-2009, 06:32 AM

I thought I'd ask if anyone might have a clue. When I start my truck at idle my head lights and dash light flicker from normal brightness to a littler dimmer. About every 10 seconds it switches back and forth. Once the truck has RPM it goes away. I'm thinking either bad ground or bad alternater. Any thoughts?

Last edited by mitymopar : 10-27-2009 at 07:19 AM. Reason: to delete post

Shibbyutman · 10-27-2009, 06:39 AM

If it is below 66 degrees outside the Grid heaters will cycle pulling huge amps that cause the rest of the lights to dim in the truck. Perfectly normal operation.

__________________
2003 Dodge Ram 2500 4X4, PDR Cobra Stage 2 Twins, BD Power 90's, Studs, Springs, Autometers, Dual 7" Black Stacks/rain caps, Banks intercooler, Goerend Full Built Trans, Smarty set to Kill, MP-8, Full DIY CP3 Mod, Rail capped

, FASS 150/150, and big line kit.

mitymopar · 10-27-2009, 07:01 AM

Thanks a lot, That I'll I need to know

nitro · 10-27-2009, 09:09 AM

Normall ops. Mine doesnt start to work until around 30-35 deg.

__________________
06' auto CTD, Quad short, Silencer MIA, K&N in stock box w/ mod and DPP cool hose, Cat delete, MBRP tip

, Greddy Turbo Timer, Custom winch mount,285/70/17 Goodyear Duratrac's, more on the way

dillonjm · 10-27-2009, 11:02 AM

This can scare people if they don't know what it is. If you watch it, it will stop once you hit 20mph.

You'll also notice your voltmeter is a lot lower until this happens as well (hence the dimming of the lights)

__________________
03 Silver Quad Cab/Short Box 2500 305/555 4x4 - 4040XL - 2" Lift - 285 75R17 Dura Grapplers

mudnducs · 11-05-2009, 06:12 PM

I noticed this (flickering/dimming) about 3 weeks ago and fretted over it some...this place ROCKS!!!!

__________________
2005 std cab long bed 4WD w/ 6speed manual...I love this 5.9!

10-27-2009, 06:32 AM	#1 (permalink)
mitymopar Newbie Join Date: Jul 2009 Location: Bend, Oregon Posts: 8 Thanks: 1 Thanked 0 Times in 0 Posts mitymopar's Truck Pics	Electrical Problem I thought I'd ask if anyone might have a clue. When I start my truck at idle my head lights and dash light flicker from normal brightness to a littler dimmer. About every 10 seconds it switches back and forth. Once the truck has RPM it goes away. I'm thinking either bad ground or bad alternater. Any thoughts? Last edited by mitymopar : 10-27-2009 at 07:19 AM. Reason: to delete post

10-27-2009, 09:09 AM	#4 (permalink)
nitro Cummins Fanatic Join Date: Nov 2008 Location: Parker, Co. Posts: 123 Thanks: 0 Thanked 2 Times in 2 Posts nitro's Truck Pics	Normall ops. Mine doesnt start to work until around 30-35 deg. __________________ 06' auto CTD, Quad short, Silencer MIA, K&N in stock box w/ mod and DPP cool hose, Cat delete, MBRP tip, Greddy Turbo Timer, Custom winch mount,285/70/17 Goodyear Duratrac's, more on the way

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10-27-2009, 06:39 AM	#2 (permalink)
Shibbyutman Diesel Head Join Date: Sep 2006 Location: Superior Township, Michigan Posts: 4,118 Thanks: 0 Thanked 170 Times in 120 Posts Shibbyutman's Truck Pics	If it is below 66 degrees outside the Grid heaters will cycle pulling huge amps that cause the rest of the lights to dim in the truck. Perfectly normal operation. __________________ 2003 Dodge Ram 2500 4X4, PDR Cobra Stage 2 Twins, BD Power 90's, Studs, Springs, Autometers, Dual 7" Black Stacks/rain caps, Banks intercooler, Goerend Full Built Trans, Smarty set to Kill, MP-8, Full DIY CP3 Mod, Rail capped , FASS 150/150, and big line kit.

10-27-2009, 07:01 AM	#3 (permalink)
mitymopar Newbie Join Date: Jul 2009 Location: Bend, Oregon Posts: 8 Thanks: 1 Thanked 0 Times in 0 Posts mitymopar's Truck Pics	Thanks a lot, That I'll I need to know

10-27-2009, 11:02 AM	#5 (permalink)
dillonjm Cummins Nut Join Date: Jun 2009 Location: AF OTS : 3 NOV - 18 FEB Posts: 428 Thanks: 1 Thanked 31 Times in 25 Posts dillonjm's Truck Pics	This can scare people if they don't know what it is. If you watch it, it will stop once you hit 20mph. You'll also notice your voltmeter is a lot lower until this happens as well (hence the dimming of the lights) __________________ 03 Silver Quad Cab/Short Box 2500 305/555 4x4 - 4040XL - 2" Lift - 285 75R17 Dura Grapplers

11-05-2009, 06:12 PM	#6 (permalink)
mudnducs Newbie Join Date: Nov 2009 Location: Oregon Posts: 5 Thanks: 0 Thanked 0 Times in 0 Posts mudnducs's Truck Pics	I noticed this (flickering/dimming) about 3 weeks ago and fretted over it some...this place ROCKS!!!! __________________ 2005 std cab long bed 4WD w/ 6speed manual...I love this 5.9!