Feedback thru turn signal - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mstacy · 04-02-2002, 08:47 PM

I am getting electrical feedback when I turn the headlights on. It makes the left turn signal dash indicator glow green. It only happens when I turn the lights on. I also noticed the left turn signal isn't quite as bright as the right. I have a new forward wiring harness and new engine harness from Brother's. It seems like it's a ground problem but I have checked the connection many times and also removed all the paint where the harness wire grounds itself to the core support. My water temp gage doesn't work either now and it used too. If I use a test light and ground the water temp out, the gage then moves. Can anyone think of a ground I may have forgotten?

------------------
Mike Stacy, S. Calif.
1971 Factory Hugger Orange Shortbed, 350/350, 20" Torq Thrusts, 3/5 drop (belongs to my son Christopher now) I am looking for a rustfree loaded 71-72 Burb.

*Fast68Chevy* · 04-02-2002, 09:20 PM

check and clean and WD40 the grounds in other places too like at the lights themselves, front and rear, time for housecleaning in the grounding department

good luck

------------------
Randy- Lincoln, IL
randy@ccaonline.com
71 C-10, trying to assemble....sigh..
parting out 5.0LTPI '81 cutlass supreme brougham
*Paint is overrated
© RSS Enterprises 2000

[This message has been edited by Fast68Chevy (edited April 02, 2002).]

Gordo · 04-02-2002, 09:31 PM

My 71 had those syptoms once and I found the left front signal/parking light housing in the bumper was not grounded well to the bumper (loose bolts), I cleaned and tightened the assembly and the problem was gone.

------------------
1971 C10 swb stepside 350/700R4/3.73posi
Killingworth, Connecticut

REPO1 · 04-02-2002, 09:39 PM

Yes, as wierd as it sounds, a ground somewhere else, even far from the front, can cause some strange things to happen.

Reid

------------------
Sylvan Lake, Alberta, Canada

1970 Chevy C20 Custom Camper
#s matching 402BB Turbo 400 trans.
Air conditioning, power steering, manual brakes.
73,600 Original Miles!!
(Add on 2000 more from raod trip!)

Longhorn Man · 04-02-2002, 09:59 PM

That is supposed to be an indivator of having a burned out bulb...30 some od years later, it does not always work like that.
Some where you have too much resistance...blown bulb, corroded socket, bad ground...all good places to start.

------------------
'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
If you need a pic posted, E-mail me at longhornmail@yahoo.com
Andy, in Columbus Ohio

mstacy · 04-02-2002, 10:13 PM

Cleaned all the sockets and put new bulbs in already. Checked all the existing grounds. Someone mentioned to me that the instrument cluster needs to be grounded too. Where is that ground wire? Everything seems to work before I replaced the wiring harness with a new one. I am sure I must have missed something somewhere. I also replaced the printed circuit board on the back of the gage cluster with a repro one.

[This message has been edited by mstacy (edited April 02, 2002).]

Sinister · 04-02-2002, 10:38 PM

was that '71 on the cover of classic trucks
a few years back?

04-02-2002, 08:47 PM	#1
mstacy Senior Member Join Date: May 2000 Location: Upland, CA 91784 (Los Angeles) Posts: 191	Feedback thru turn signal I am getting electrical feedback when I turn the headlights on. It makes the left turn signal dash indicator glow green. It only happens when I turn the lights on. I also noticed the left turn signal isn't quite as bright as the right. I have a new forward wiring harness and new engine harness from Brother's. It seems like it's a ground problem but I have checked the connection many times and also removed all the paint where the harness wire grounds itself to the core support. My water temp gage doesn't work either now and it used too. If I use a test light and ground the water temp out, the gage then moves. Can anyone think of a ground I may have forgotten? ------------------ Mike Stacy, S. Calif. 1971 Factory Hugger Orange Shortbed, 350/350, 20" Torq Thrusts, 3/5 drop (belongs to my son Christopher now) I am looking for a rustfree loaded 71-72 Burb. __________________ Mike Stacy, S. Calif. 1971 Factory Hugger Orange Shortbed, 350/350, 20" Torq Thrusts, 3/5 drop (belongs to my son Christopher now)

04-02-2002, 09:31 PM	#3
Gordo Registered User Join Date: Jan 2001 Location: Killingworth, CT. USA Posts: 3,378	My 71 had those syptoms once and I found the left front signal/parking light housing in the bumper was not grounded well to the bumper (loose bolts), I cleaned and tightened the assembly and the problem was gone. ------------------ 1971 C10 swb stepside 350/700R4/3.73posi Killingworth, Connecticut __________________ 1971 C10 swb stepside 350/700R4/3.73posi (retired as of 4/22/03) 1998 S10 short bed 2002 S10 Blazer 1942 Oldsmobile 1958 Massey Harris Pony 1951 Wife Killingworth, Connecticut May those who love us, love us, any of those who do not love us, may God turn their hearts. And if God is unable to turn their hearts, may he turn their ankles so we may know them by their limping. A man who works with his hands is a laborer; a man who works with his hands and his brain is a craftsman; but a man who works with his hands and his brain and his heart is an artist.

04-02-2002, 09:39 PM	#4
REPO1 Shortbox wanna-be. Join Date: Mar 2002 Location: Fort St.John, British Columbia, Canada Posts: 773	Yes, as wierd as it sounds, a ground somewhere else, even far from the front, can cause some strange things to happen. Reid ------------------ Sylvan Lake, Alberta, Canada 1970 Chevy C20 Custom Camper #s matching 402BB Turbo 400 trans. Air conditioning, power steering, manual brakes. 73,600 Original Miles!! (Add on 2000 more from raod trip!) __________________ 1970 Chevy C20 Custom Camper 402BB Turbo 400 trans. (Slowly becoming a '70 shortbox 1/2 ton) '71 Camaro SS 402/T400 resto '97 Z28 (11.41@127MPH)

04-02-2002, 10:13 PM	#6
mstacy Senior Member Join Date: May 2000 Location: Upland, CA 91784 (Los Angeles) Posts: 191	Cleaned all the sockets and put new bulbs in already. Checked all the existing grounds. Someone mentioned to me that the instrument cluster needs to be grounded too. Where is that ground wire? Everything seems to work before I replaced the wiring harness with a new one. I am sure I must have missed something somewhere. I also replaced the printed circuit board on the back of the gage cluster with a repro one. [This message has been edited by mstacy (edited April 02, 2002).] __________________ Mike Stacy, S. Calif. 1971 Factory Hugger Orange Shortbed, 350/350, 20" Torq Thrusts, 3/5 drop (belongs to my son Christopher now)

04-02-2002, 10:38 PM	#7
Sinister Between Trucks... Join Date: Mar 2002 Location: Los Angeles, CA. Posts: 3,830	was that '71 on the cover of classic trucks a few years back? __________________ Beat it to fit, Paint it to match...

04-02-2002, 09:20 PM	#2
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	check and clean and WD40 the grounds in other places too like at the lights themselves, front and rear, time for housecleaning in the grounding department good luck ------------------ Randy- Lincoln, IL randy@ccaonline.com 71 C-10, trying to assemble....sigh.. parting out 5.0LTPI '81 cutlass supreme brougham *Paint is overrated © RSS Enterprises 2000 [This message has been edited by Fast68Chevy (edited April 02, 2002).]

04-02-2002, 09:59 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	That is supposed to be an indivator of having a burned out bulb...30 some od years later, it does not always work like that. Some where you have too much resistance...blown bulb, corroded socket, bad ground...all good places to start. ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio



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