Lights Flicker - upgrade alternator? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

53lowdown · 12-22-2006, 11:13 AM

My headlights flicker when driving and dim when idling, and I was wondering if an upgrade to the alternator is the fix? 69 C10 with what looks like good original wiring. I looked at the thread below about swaping to internal regulated alt, but was wondering if a one-wire alternator would be easier and work as well?

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

shifty · 12-22-2006, 11:16 AM

Before you do anything, I would do the "relay" mod on your headlights if you haven't already. There is a writeup about this in the FAQ section. Headlights will never be dim again, and it might fix your problem.

Otherwise, might wanna test your battery first. Then check your voltage regulator, then have the alternator tested. You can have the alternator and the battery tested free at your local auto parts chain store.

cdowns · 12-22-2006, 12:08 PM

flickering i'd clean and tighten contacts and most importantly clean and tighten ground wires

**jerry moss** · 12-22-2006, 01:26 PM

my daily driver was doing the same thing until i put on a later alternator with a built in regulator. we did it at work one morning when it was slow, only took a few minutes to wire it and i love the difference.

71cheyennezz4 · 12-22-2006, 01:53 PM

mine dont flicker but they god dim at an idle because of my cam

12-22-2006, 11:13 AM	#1
53lowdown Junior Member Join Date: Feb 2005 Location: topeka, kansas Posts: 258	Lights Flicker - upgrade alternator? My headlights flicker when driving and dim when idling, and I was wondering if an upgrade to the alternator is the fix? 69 C10 with what looks like good original wiring. I looked at the thread below about swaping to internal regulated alt, but was wondering if a one-wire alternator would be easier and work as well? http://67-72chevytrucks.com/vboard/s...d.php?t=119379 __________________ _______________________________________ 62 SWB BBW (under construction) 86 Vette Convertible

12-22-2006, 11:16 AM	#2
shifty Questionable Join Date: Mar 2005 Location: Atlanta Posts: 13,376	Re: Lights Flicker - upgrade alternator? Before you do anything, I would do the "relay" mod on your headlights if you haven't already. There is a writeup about this in the FAQ section. Headlights will never be dim again, and it might fix your problem. Otherwise, might wanna test your battery first. Then check your voltage regulator, then have the alternator tested. You can have the alternator and the battery tested free at your local auto parts chain store. __________________ If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.

12-22-2006, 12:08 PM	#3
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Lights Flicker - upgrade alternator? flickering i'd clean and tighten contacts and most importantly clean and tighten ground wires __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

12-22-2006, 01:26 PM	#4
jerry moss Born Psycho Join Date: Feb 2001 Location: brentwood,cal,usa Posts: 4,890	Re: Lights Flicker - upgrade alternator? my daily driver was doing the same thing until i put on a later alternator with a built in regulator. we did it at work one morning when it was slow, only took a few minutes to wire it and i love the difference. __________________ jerry moss 72 cheyenne super K20- tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,tow hooks,bumper guards,toolbox,aux. fuel tank,posi front and rear,plus other goodies!!! SOLD 69 suburban K20-tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,4 inch all spring lift,4 speed, 14 bolt full floater, dana 44 HD,warn winch,posi front and rear,tow hooks,plus other goodies. 73/80 chevy/gmc K20 SB400,turbo 400,205,tilt,a-c,gas hog. 77 K/5 cheyenne blazer-daily driver/beater. SON HAS IT NOW BRENTWOOD,CALIFORNIA

12-22-2006, 01:53 PM	#5
71cheyennezz4 Registered User Join Date: Mar 2006 Location: York Nebraska Posts: 64	Re: Lights Flicker - upgrade alternator? mine dont flicker but they god dim at an idle because of my cam __________________ http://www.cardomain.com/ride/2269113 http://classictruckworld.tenmagazine...ry.ten?id=3895



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