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Old 10-10-2017, 08:23 PM   #1
Got Smoke?
 
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Head/dash lights pulsing?

Anybody else has this occur with their trucks?

My 07.5 megacab's entire instrument cluster as well as the headlights will pulse while I'm driving down the road at highway speeds showing 13-14 volts on the dash and the Edge CTS II.

DRIVES ME NUTS! Anybody had this issue what was the fix?
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2007 2500 Mega 68RFE FirePunk EFI/CSP5 & TCM tuning, Edge CTS II.

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Old 10-10-2017, 09:42 PM   #2
BRE
 
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Alternator. Been there done that.


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Old 10-11-2017, 06:04 AM   #3
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Alternator on mine also, would do it most early in the morning when cool.
 
Old 10-11-2017, 06:13 AM   #4
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I would say its the grid heater.
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Old 10-11-2017, 06:18 AM   #5
jasonc

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Cool as in 60* at the time, would surge the headlights for about the first 30miles. Replacement alt fixed it.
 
Old 10-11-2017, 03:30 PM   #6
mhuggler

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Quote:
Originally Posted by Got Smoke? View Post
Anybody else has this occur with their trucks?

My 07.5 megacab's entire instrument cluster as well as the headlights will pulse while I'm driving down the road at highway speeds showing 13-14 volts on the dash and the Edge CTS II.

DRIVES ME NUTS! Anybody had this issue what was the fix?
Replace your alternator. Bad diode in the rectifier.
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Old 10-11-2017, 04:16 PM   #7
Chris Tobin
 
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Could also be a bad/loose/corroded ground connection/cable.
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Old 10-14-2017, 11:18 AM   #8
Got Smoke?
 
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Originally Posted by SPEEDSHIFT View Post
I would say its the grid heater.
No not while driving down the highway its not. :
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2007 2500 Mega 68RFE FirePunk EFI/CSP5 & TCM tuning, Edge CTS II.

1997 2500 Jokerfab cyl head, PDR street cam, FDS benched pump, DFI 5x18's, HX35 63/67, FirePunk 47RE & anteater.

2003 Jetta TDI 5spd "DZL WGN" lot's of mods
 
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