Voltage rebulator? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**70STOVEBOLT** · 03-20-2008, 06:00 AM

What causes lights to flicker lightly when the engine is cold? Once it warms up, it seems to go away, or at least I don't seem to notice it after it warms up. Seems like I remember something about a defective voltage regulator causing this. Any help?

68gmsee · 03-20-2008, 06:11 AM

I would start with a check of all ground cables and battery connections first. Make sure they have a clean and tight connection and the cables in good shape. Also, check the alternator connectors and belt.

If all that is good, then maybe start with voltage regulator, battery and/or alternator problems.

redhead69 · 03-20-2008, 06:16 AM

my nova did that real bad then switched over to an si internal regulator and viola nice and steady.. brighter too

**70STOVEBOLT** · 03-20-2008, 06:05 PM

I recently replaced the battery, but all the connections are tight. I replaced the alternator and voltage regulator about 3 yrs ago. I'll check the belt. It doesn't do it all the time, it's intermittent.
Redhead, to change to an internally regulated type, do you just have to change the plug on the alterator harness and disconnect the regulator, or is it more involved than that?
Thanks for the info guys, I appreciate it.

**El Jay** · 03-20-2008, 11:32 PM

Quote:

Originally Posted by 70STOVEBOLT

I recently replaced the battery, but all the connections are tight. I replaced the alternator and voltage regulator about 3 yrs ago. I'll check the belt. It doesn't do it all the time, it's intermittent.
Redhead, to change to an internally regulated type, do you just have to change the plug on the alterator harness and disconnect the regulator, or is it more involved than that?
Thanks for the info guys, I appreciate it.

Somebody brought this up just the other day & was nice enough to post this link.

http://67-72chevytrucks.com/vboard/s...d.php?t=119379

**70STOVEBOLT** · 03-20-2008, 11:45 PM

El Jay, I can't get the link to work. I tried to copy and paste it into the browser, but it still doesn't work, the page opens and displays "Not Found". I will try to search the board for that thread, thanks.

**john** · 03-21-2008, 12:49 AM

Heres another link.

http://67-72chevytrucks.com/vboard/s...d.php?t=119379

**70STOVEBOLT** · 03-21-2008, 12:51 AM

That one worked, thanks guys. I'll post my findings after I check things out tonight.

**El Jay** · 03-21-2008, 12:57 AM

Quote:

Originally Posted by john

Heres another link.

http://67-72chevytrucks.com/vboard/s...d.php?t=119379

That link takes you right to the exact same set of directions I'd seen earlier.

03-20-2008, 06:00 AM	#1
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,266	Voltage rebulator? What causes lights to flicker lightly when the engine is cold? Once it warms up, it seems to go away, or at least I don't seem to notice it after it warms up. Seems like I remember something about a defective voltage regulator causing this. Any help? __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

03-20-2008, 06:11 AM	#2
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: Voltage rebulator? I would start with a check of all ground cables and battery connections first. Make sure they have a clean and tight connection and the cables in good shape. Also, check the alternator connectors and belt. If all that is good, then maybe start with voltage regulator, battery and/or alternator problems.

03-20-2008, 06:16 AM	#3
redhead69 fugedaboutit Join Date: Mar 2005 Location: Gresham, OR Posts: 832	Re: Voltage rebulator? my nova did that real bad then switched over to an si internal regulator and viola nice and steady.. brighter too __________________ Currently truckless

03-20-2008, 06:05 PM	#4
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,266	Re: Voltage rebulator? I recently replaced the battery, but all the connections are tight. I replaced the alternator and voltage regulator about 3 yrs ago. I'll check the belt. It doesn't do it all the time, it's intermittent. Redhead, to change to an internally regulated type, do you just have to change the plug on the alterator harness and disconnect the regulator, or is it more involved than that? Thanks for the info guys, I appreciate it. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

03-20-2008, 11:45 PM	#6
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,266	Re: Voltage rebulator? El Jay, I can't get the link to work. I tried to copy and paste it into the browser, but it still doesn't work, the page opens and displays "Not Found". I will try to search the board for that thread, thanks. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

03-21-2008, 12:49 AM	#7
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	Re: Voltage rebulator? Heres another link. http://67-72chevytrucks.com/vboard/s...d.php?t=119379 __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/

03-21-2008, 12:51 AM	#8
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,266	Re: Voltage rebulator? That one worked, thanks guys. I'll post my findings after I check things out tonight. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear



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