1968 Chevy C10 Blinker Problem

chevylover · 04-26-2005, 04:14 PM

my 68 truck has a weird blinker problem. when i bought the truck it never worked so I replaced the switch in the steering collum. now you turn the switch for the left blinker and the front the light comes on and stays on (doesnt blink), the rear blinker only comes on and stays on when you hit the brake petal and hold it (doesnt blink). the same goes for the right blinker. also the parking lights dont come on when you pull headlight switch half way or all the way. the headlight switch is also new and all fuses are good. also I replaced both flashers. what do you think cause i'm stumped.

batty_professor · 04-26-2005, 04:56 PM

The shell of the bulbs aren't getting ground connection through the sockets. Those old plastic sockets that GM used at the time were notorious for that. Sounds like you have the same problem at all four sockets. You'll probably find the metal inserts in the sockets don't like to stay in the plastic very well, and that's usually the biggest problem with making contact. If you'll disassemble the sockets and offset the barbs on the tangs, much as using a sawset to set saw teeth, you may be able to get them to get a grip, and stay together for a while.

sinclair_tm · 04-26-2005, 09:53 PM

are any of the lights out that flash, like the dash lights, front, side and rear. on my 76, if one of those 4 blubs goes out, that side acts like you said. also, make sure the haszard is wired correctly. it could cause both sides to act this way.

Volt-Schwibe · 04-26-2005, 10:11 PM

one thing to check is if the wiring has been chopped into to add a trailer harness.

if such is the case, you may need to sit down with a good 8 hours, and track down each wire, and compare it to a diagram.

if i get my scanner working, i can scan you a schematic for that truck.

if not, i will do what i can to gather one from online, or even just copy it into paint.

it's only a few dozen wires anyhow.

but, see if that has been hacked into back up under the bed by the bumper, and if it has, there may be some serious crossed wire issues.

other than that, i will think about it and come back.

**Midnight Tech** · 04-27-2005, 08:21 PM

I've gotta agree with Walt on this...sure sounds like a short/open in that rear wiring of some kind...are all the fuses of the correct size?

chevylover · 04-27-2005, 09:15 PM

I have a wiring diagram but another one wouldn't hurt. The fuses are new and I put the same size that came out back in. I have no way of knowing what sizes go where. Also using a wiring diagram I rewired the rear light from the dash board back. The truck when I bought it had no rear lights. any help is appreciated.

RLK

Nazca · 04-05-2007, 03:45 PM

Quote:

Originally Posted by sinclair_tm

are any of the lights out that flash, like the dash lights, front, side and rear. on my 76, if one of those 4 blubs goes out, that side acts like you said. also, make sure the haszard is wired correctly. it could cause both sides to act this way.

Dude I love you.

I have a 1978 jeep cj-7. I was backing it out of the garage today and I noticed that when I hit the brakes the blinkers came on. In the front and in the back. It also displayed the blinkers on the speedometer. No flashing. I spent like an hour trying to figure it out. I thought it was crossed wires. I looked here (first site I found) and noticed your post about the hazard lights. I turned them 'on' ('on' as in they dont work) and the brakes and blinkers worked correctly. =]

Thanks a lot.

Next job is re-wiring hazard lights I guess.

**Midnight Tech** · 04-05-2007, 06:44 PM

Check for a bulb installed backwards or touching both contacts at once...it'd make it feedback and do something like that.

**qldit** · 04-05-2007, 07:01 PM

Good morning gentlemen, I have seen this problem caused by an incorrect globe (single contact type) forced into a dual contact socket.

You might try taking all indicator globes out and checking correctness.

If you have hazard warning it may also be affected.

Bad earthing from sockets can also cause similar problems.

Cheers, qldit.

04-26-2005, 04:14 PM	#1 (permalink)
chevylover Registered User Join Date: Apr 2005 Posts: 2 OS: xp	1968 Chevy C10 Blinker Problem my 68 truck has a weird blinker problem. when i bought the truck it never worked so I replaced the switch in the steering collum. now you turn the switch for the left blinker and the front the light comes on and stays on (doesnt blink), the rear blinker only comes on and stays on when you hit the brake petal and hold it (doesnt blink). the same goes for the right blinker. also the parking lights dont come on when you pull headlight switch half way or all the way. the headlight switch is also new and all fuses are good. also I replaced both flashers. what do you think cause i'm stumped.

04-26-2005, 04:56 PM	#2 (permalink)
batty_professor Asst. Manager, Alternative Computing Forums Join Date: Jul 2004 Location: Hooterville Il 45 mi. east of St. Louis mo Posts: 2,608 OS: Fedora Core 5 for now	The shell of the bulbs aren't getting ground connection through the sockets. Those old plastic sockets that GM used at the time were notorious for that. Sounds like you have the same problem at all four sockets. You'll probably find the metal inserts in the sockets don't like to stay in the plastic very well, and that's usually the biggest problem with making contact. If you'll disassemble the sockets and offset the barbs on the tangs, much as using a sawset to set saw teeth, you may be able to get them to get a grip, and stay together for a while. __________________ It's better to know me and not need me than to need me and not know me. B. While users are never under any obligation, if you feel the urge please feel free to visit our donation page. Every little bit helps. And we thank you for your support. Microsoft free Registered Linux user 397458 Last edited by batty_professor; 04-26-2005 at 05:05 PM. Reason: typo

04-26-2005, 10:11 PM	#4 (permalink)
Volt-Schwibe Asst. Manager, Automotive Forums; HJT Trainee Join Date: Jan 2003 Location: Behind you, watching you as you type. Posts: 7,352 OS: Click "My System" to view details My System	one thing to check is if the wiring has been chopped into to add a trailer harness. if such is the case, you may need to sit down with a good 8 hours, and track down each wire, and compare it to a diagram. if i get my scanner working, i can scan you a schematic for that truck. if not, i will do what i can to gather one from online, or even just copy it into paint. it's only a few dozen wires anyhow. but, see if that has been hacked into back up under the bed by the bumper, and if it has, there may be some serious crossed wire issues. other than that, i will think about it and come back. __________________ <signature> TSF is funded by our Admin's pocket, care to help? Power Tip: Subscribe to your thread (Thread Tools) to receive an instant email notification when you get a reply. New Members: Creating a single new thread in the correct section is the best way to assure your thread will receive a reply. </signature>

04-27-2005, 08:21 PM	#5 (permalink)
Midnight Tech Admin/Head GreaseMonkey/Igor's alter ego/Grand Exalted PoohBah Join Date: Dec 2001 Location: SC Posts: 2,904 OS: Windows XP Home/Pro SP3/Windows 98SE/Fedora Core 6/RH 7.2 with Autopoint/TAMS II	I've gotta agree with Walt on this...sure sounds like a short/open in that rear wiring of some kind...are all the fuses of the correct size? __________________ Please post all questions in the appropriate forum. Questions sent by email or PM will not be answered. Sharing my life...with my Imzadi! Interested in Trek gaming? Check out the Dynaverse! Proud supporter of the Carolinas Aviation Museum. If we have helped you in any way, please donate to keep TSF up and running!

04-05-2007, 06:44 PM	#8 (permalink)
Midnight Tech Admin/Head GreaseMonkey/Igor's alter ego/Grand Exalted PoohBah Join Date: Dec 2001 Location: SC Posts: 2,904 OS: Windows XP Home/Pro SP3/Windows 98SE/Fedora Core 6/RH 7.2 with Autopoint/TAMS II	Re: 1968 Chevy C10 Blinker Problem Check for a bulb installed backwards or touching both contacts at once...it'd make it feedback and do something like that. __________________ Please post all questions in the appropriate forum. Questions sent by email or PM will not be answered. Sharing my life...with my Imzadi! Interested in Trek gaming? Check out the Dynaverse! Proud supporter of the Carolinas Aviation Museum. If we have helped you in any way, please donate to keep TSF up and running!

04-27-2005, 09:15 PM	#6 (permalink)
chevylover Registered User Join Date: Apr 2005 Posts: 2 OS: xp	I have a wiring diagram but another one wouldn't hurt. The fuses are new and I put the same size that came out back in. I have no way of knowing what sizes go where. Also using a wiring diagram I rewired the rear light from the dash board back. The truck when I bought it had no rear lights. any help is appreciated. RLK

04-05-2007, 07:01 PM	#9 (permalink)
qldit TSF Gearhead Join Date: Mar 2007 Location: Brisbane Australia. Posts: 592 OS: All Systems, mainly Linux	Re: 1968 Chevy C10 Blinker Problem Good morning gentlemen, I have seen this problem caused by an incorrect globe (single contact type) forced into a dual contact socket. You might try taking all indicator globes out and checking correctness. If you have hazard warning it may also be affected. Bad earthing from sockets can also cause similar problems. Cheers, qldit.