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#1 |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Right blinkers work but only tail light blinker works on left
Im new to the forums so dont bite my head off. I have a 71 gmc c15. I have looked for this in the seach fountion and could not find any thing. The right blinkers work fine but the left only the tail light blinks . Slowly i may add. It also dont have the green arrow on the dash when i go to use the left blinker. Same with hazzards. High beams does not affect it. I dont think its a ground but maby. It some times works. Like 5% of the time. It also has a new relay and hazzard swich. No bulbs are burnt out. So im cunfused
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#2 |
Registered User
Join Date: Dec 2016
Location: Strongstown
Posts: 57
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I'd check the ground and check for corrosion at the contact points,including the sides of socket and the bulb.
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#3 |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Right blinkers work but only tail light blinker works on left
Whare does it normal ground at ? I herd buy the frount bumper. Have to look tomorrow.
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#4 |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Right blinkers work but only tail light blinker works on left
Ignor figering out how to post pics
Last edited by 71gmcC15; 02-06-2018 at 10:51 PM. Reason: Figered it out |
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#5 |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,497
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Re: Right blinkers work but only tail light blinker works on left
-
Read through this thread on the grounds.... http://67-72chevytrucks.com/vboard/s...t=ground+strap LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#6 |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Right blinkers work but only tail light blinker works on left
Thanks but i dont think ground straps are the issue. The ground on the lights them selves is what im looking for. I will look for it when its nice out again.
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#7 |
Registered User
Join Date: Mar 2016
Location: hickory, ky
Posts: 1,282
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Re: Right blinkers work but only tail light blinker works on left
I will take a stab at this. First off, did they work and just quit working? My bet is that you have an incomplete circuit on your left side. Two suspect places to look first. Your tail light housing .make sure your brown wire and your yellow wire have a good connection . If need be, add a ground from the housing mounting screw to the frame. Now your turn signals go through your cancellation switch under your steering wheel as well. Pull your wheel and inspect the operation of the switch. If you have a cheap test light, you can se if you are passing power at the switch. Lastly swap your hazard flasher with your blinker flasher. Do all these things one at a time and check for results as you go. Same with my truck. The rear harness was hacked beyond belief.
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:My build thread http://67-72chevytrucks.com/vboard/s...d.php?t=807535 1972 K10 swb/1968 Camaro 350/4spd 1955 210 2 dr sedan/1998 RCSB Z71 |
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#8 |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Right blinkers work but only tail light blinker works on left
They light up just dont blink. Just random when they do blink .I will check the wires and relays when its not -10 F. Thanks for the help
Last edited by 71gmcC15; 02-07-2018 at 09:36 AM. Reason: Reword |
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#9 | |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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#10 |
Registered User
Join Date: May 2014
Location: Matamoras, PA
Posts: 397
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Re: Right blinkers work but only tail light blinker works on left
I've had this problem before. Probably bad ground on front marker light housing. Reach under there and spin the bulb socket back and forth in the housing, that's your ground.
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#11 |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Right blinkers work but only tail light blinker works on left
I tryed it and it did nothing if it was a bad ground it would light up at all right? It lights up when i turn my lights on. All my lights work and the tail light blinks on the left just not the side marker or park light. And all of them blink on the right.
Last edited by 71gmcC15; 02-07-2018 at 05:41 PM. Reason: Editing |
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#12 |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Right blinkers work but only tail light blinker works on left
I found a wire about in the middle of thr pickup under the tailgate. Is ether black or dark brown cant tell i tryed grounding it and it did nothing. ( i got to get a test light). Is it for the licen plate lights i dont have or what. I will check the wireing diagram. Just cheked it its for the licen plate lights
Last edited by 71gmcC15; 02-07-2018 at 05:34 PM. Reason: New info |
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#13 | |
Registered User
Join Date: Mar 2014
Location: Lincoln Park, NJ
Posts: 189
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Re: Right blinkers work but only tail light blinker works on left
Quote:
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#14 |
Registered User
Join Date: May 2014
Location: Matamoras, PA
Posts: 397
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Re: Right blinkers work but only tail light blinker works on left
Dang, thought that would do it. You sure it's not the bulb? Sometimes the filament will break apart but look like it's still intact. Try different bulbs if you haven't already.
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#15 |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Right blinkers work but only tail light blinker works on left
It light up so is not the bulb. Is it a duel elmeny 194? I dont understand how that could be cuz the other side works. my low beam headlight out but on the right side. That cant be the reason. Can it? If i use high beam it chages nothing. Remeber i have 4 headlights.
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#16 |
Registered User
Join Date: Mar 2016
Location: hickory, ky
Posts: 1,282
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Re: Right blinkers work but only tail light blinker works on left
Ok. your marker lights on the side of the truck should NOT blink. They are fed with dark brown wire as is the tail lamp and the license plate lamp. DO NOT GROUND it. tape it up if not in use. Your rear harness is hacked just like mine was. Google the tail lamp circuit for a 1969 or so chevy and get a diagram that shows you the color wires you need for each side. Now go to your harness plug on the drivers side frame rail and un plug th rear light harness from it. Take a meter or test light with your lights on. the one that is hot all the time is your brown wire. Send it to each side on the taillights and markers(side) and stub it off at your plate lamp if you don't have one. Next turn on your left blinker. Find the terminal in your harness that passes power on cycle. That is your left. The green wire is your back up lamps and the other one, forgive me I am color blind, is your right blinker. It should cycle power in the plug too. If you are not cycling power in the rear plug with your blinker on, then the problem is in your flasher or column. If all goes well plug it bag in and you will have it, If not report back.
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:My build thread http://67-72chevytrucks.com/vboard/s...d.php?t=807535 1972 K10 swb/1968 Camaro 350/4spd 1955 210 2 dr sedan/1998 RCSB Z71 |
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#17 | |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Right blinkers work but only tail light blinker works on left
Quote:
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![]() 94 chevy k1500 350 tbi 373 rear gears 4l60e one wheel peel. Gutless 07 gmc sierra classic rcsb 4.3 lt 5 speed w/t 04 chevy Silverado 1500 ext cab 5.3 4l60e. 81 chevy Scottsdale k10 muncie sm465 Np208 10 bolt 8.2 ( Old Green) |
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#18 |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Right blinkers work but only tail light blinker works on left
Ok so the frount side markers dont blink. My right one does and i thought just the frounts blinks. If the dont then basicly what you are saying is to start over with the harness. Ok i could do that. but some times the left blinkers do work with the side marker blinking. I would love to just get it working that way. My left park light doent blink ether is that the same problum.
Last edited by 71gmcC15; 02-07-2018 at 06:50 PM. |
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#19 |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Right blinkers work but only tail light blinker works on left
I also am a bit of a wiring noob so as i can see the yellow wire is the left turn single. I what to know whare it goes from the plug on the fram up tord the cab if i can find that wire then i can spice into it and run it to the park light and side light. But my other ? Is if i do that do i just splice into the brown wire on the side marker and wich wire in the parligh? blue or white?
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#20 | |
Registered User
Join Date: Mar 2014
Location: Lincoln Park, NJ
Posts: 189
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Re: Right blinkers work but only tail light blinker works on left
Quote:
The parking and side marker lights should be on the brown wire and ground to the body.
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#21 | |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Right blinkers work but only tail light blinker works on left
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#22 | |
Registered User
Join Date: Mar 2014
Location: Lincoln Park, NJ
Posts: 189
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Re: Right blinkers work but only tail light blinker works on left
Quote:
The front wires are not nearly that simple and do not run along the left frame rail to the firewall. instead they come out of the bulkhead connector, through the left fender and out again up by the left headlight/regulator/horn.
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#23 | |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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#24 |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Right blinkers work but only tail light blinker works on left
The blue and white wires do go throw the core support but i dont think it unplugs. Not a 100% sure but i will take a look tomarrow. Thares a hole the wirs pass throw in the core sapport and it has a black gromment looking thing that sits in the hole. Is the black grommet/ hole plug also a wire conecter. Like the one that conects the rear tail lights ?
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![]() 94 chevy k1500 350 tbi 373 rear gears 4l60e one wheel peel. Gutless 07 gmc sierra classic rcsb 4.3 lt 5 speed w/t 04 chevy Silverado 1500 ext cab 5.3 4l60e. 81 chevy Scottsdale k10 muncie sm465 Np208 10 bolt 8.2 ( Old Green) |
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#25 |
Registered User
Join Date: Mar 2016
Location: hickory, ky
Posts: 1,282
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Re: Right blinkers work but only tail light blinker works on left
I am sorry, your original post said tail light. I was assuming you were working on the rear of your truck. Same rules apply no matter where. You have to have power to the bulb, front or back of the truck.
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:My build thread http://67-72chevytrucks.com/vboard/s...d.php?t=807535 1972 K10 swb/1968 Camaro 350/4spd 1955 210 2 dr sedan/1998 RCSB Z71 |
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