Turn signal goes fast or slow - Team Camaro Tech
Electrical & Wiring Troubleshooting electrical.

 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old Sep 27th, 09, 01:37 PM Thread Starter
Senior Tech
Patrick
 
Join Date: Aug 2009
Location: SW Florida
Posts: 575
Turn signal goes fast or slow

Sometimes the turn signal has a fast flash, other times its slow. Perhaps the flasher selenoid(?) is grounding and un grounding? I notice it is not tied to anything under the dash but is hanging free.

Not sure.

1968 Convertible L92 VVT project, Hotchkiss lowering front & rear.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
68problemchild is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old Sep 28th, 09, 11:00 AM
Gold Lifetime Member
Mickey
 
Moonpie's Avatar
 
Join Date: May 2008
Location: Mesquite Texas
Posts: 2,151
Re: Turn signal goes fast or slow

Try another solenoid.
Moonpie is offline  
post #3 of 8 (permalink) Old Sep 28th, 09, 10:37 PM
Senior Tech
Kev
 
Join Date: Dec 2007
Location: North Texas
Posts: 620
Re: Turn signal goes fast or slow

Flashers aren't solenoids. They contain a bimetallic strip with a contact on one end and a fixed contact that the other touches. Thus, its a normally closed switch.

A bimetallic strip is two strips of dissimilar metals bonded together. When heated it bends.

When the turn signal switch is closed, current flows through the flasher, which heats the bimetallic strip, causing it to bend and cause the contacts not to touch. Then it cools and it bends back, causing the contacts to touch again. Blink. Repeat.

So if it flashes slow, current is lower. More current makes for a faster flash rate.

I'd look for bad/loose grounds.

Whew! That was long winded...
67sc is offline  
 
post #4 of 8 (permalink) Old Sep 29th, 09, 11:40 AM
Gold Lifetime Member
Mickey
 
Moonpie's Avatar
 
Join Date: May 2008
Location: Mesquite Texas
Posts: 2,151
Re: Turn signal goes fast or slow

Oops, my mistake. Try another flasher unit,Patrick. That should show whats wrong real quick.I know that different flashers flash at different rates but no matter what rate they flash it should be constant. Perhaps the bimetallic switch has lost some of its temper or is even installed incorrectly inside the little can. If the new flasher unit does the same thing then you might have a slight electrical problem. More long-windedness on my part too. lol.
Whereabouts are you in North Texas 67sc ?
Moonpie is offline  
post #5 of 8 (permalink) Old Sep 29th, 09, 05:14 PM
Senior Tech
Kev
 
Join Date: Dec 2007
Location: North Texas
Posts: 620
Re: Turn signal goes fast or slow

Try swapping the 4 way flasher with the turn signal one. I'd expect it to flash the hazards faster and the turn sigs slower due to the difference in current.

Does the speed vary while the car is sitting and turned off, running, moving down the road, etc.?

Are any of the flashing lights dimmer or more bright when it flashes fast or slow?

Is the difference when the parking or brake lights are on?

I'm in Grapevine...
67sc is offline  
post #6 of 8 (permalink) Old Sep 29th, 09, 06:11 PM
Senior Tech
 
Join Date: Mar 2002
Location: Austin, TX, USA
Posts: 5,277
Re: Turn signal goes fast or slow

Rappidly flashing signals is a sign of a short circuit. The current flow increases enough to cause the flasher to toggle on and off rapidly due to rapid heating of the bi-metal strip.

Dave
========================
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
dnult is offline  
post #7 of 8 (permalink) Old Oct 3rd, 09, 06:12 AM Thread Starter
Senior Tech
Patrick
 
Join Date: Aug 2009
Location: SW Florida
Posts: 575
Re: Turn signal goes fast or slow

If this is a short, does the turn signal help me narrow down its location?

Where do I start?

Also, I have an MSD electronic tach wire running to the tach unit. Could this be putting electricity (backfilling) the circuits?

1968 Convertible L92 VVT project, Hotchkiss lowering front & rear.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by 68problemchild; Oct 3rd, 09 at 07:06 AM.
68problemchild is offline  
post #8 of 8 (permalink) Old Oct 3rd, 09, 06:27 AM
 
Join Date: Sep 2009
Posts: 1
Re: Turn signal goes fast or slow

Hello,

I have a similar problem, but my turn signals only flash very rapidly.

Are some of the sending units fast and some slower?

Might it be a hazard flaser iinstalled in place of a turn signal flasher?

If a ground, where's the first place to look?

Thanks,

Mike
mgcvd is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

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

Password:


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:
OR

Log-in










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