Solution to both turn signals blinking - Team Camaro Tech
Electrical & Wiring Troubleshooting electrical.

LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old Feb 5th, 12, 06:04 AM Thread Starter
Senior Tech
Join Date: Jul 2010
Location: TN
Posts: 226
Solution to both turn signals blinking

This problem comes up pretty regular, and describing it is difficult with text, so I thought I would put together a quick solution to the problem of both turn signals blinking when one side or the other is turned on.

Here is a quick schematic of the turn/parking lamp circuit. Notice that each bulb has two filaments, and that both filaments basically ground to the same point. Also notice that the park lamps are fed by a common purple wire.

So the problem comes when one of the grounds is weak, or non-existent. This marked up schematic shows what happens. The current path is shown with the arrows. Basically a parasitic path to ground is found through the opposite bulb socket, passing through the parking lamp on the opposite side on the way.

What are some sources of weak ground? The obvious are a broken wire, bad attachment point to the body, or as in this picture, something less obvious.

There are no less than 3 mechanical interfaces where resistance builds up over time in the lamp housing. Try ohming out from the inner brass socket to the end of the ground wire. It should be almost 0. Mine was infinite. I fixed mine by taking my plumbers torch and solder and brazing the metal together at each interface.

Life is too short to drive cars that suck.
'67 Convertible

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
r_w is offline  
Sponsored Links
post #2 of 2 (permalink) Old Feb 5th, 12, 06:30 AM
Super Moderator
Bess-68's rule
Everett#2390's Avatar
Join Date: Sep 2000
Location: Va Beach VA
Posts: 31,671
Re: Solution to both turn signals blinking

Very good, RW.

Give a man a rescued dog for the health of both their souls. May 2017 ROTM Winner - Thank you!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
CUBS - 2016 World Series Champions - Thank you, Joe Madden enjoy your next chapter.
Everett#2390 is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome