Questions About Blinkers

Berkautobarn

Berkautobarn

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Hey Everyone, I am having this occurrence on my 1974 3.0 cs when you switch the blinker on it just stays on and does not pulse. It happens on both sides. I am wondering if the mechanism is grimy and needs to be cleaned or if it’s a further wiring issue.

Any thoughts here? Thank you
 
Try a new relay - there is the original one and a newer digital version

Sean Haas

Thread 'yet another flasher thread...'

Have been chasing the same issues everyone has, dash indicator not working. Left mostly never worked, right conked out recently. I have checked grounds, contacts, etc. in the lights. External lights always worked fine and are uniformly bright. I built the pigtail setup and added an electronic flasher relay - dash indicator lit up, but stopped after 4 times or so, is very inconsistent but never stays lit. It works fine with the hazard switch so I know the indicator bulb is OK. Am I correct in thinking that with the electronic relay this narrows it down to the path between the relay...
 
The device inside what many people incorrectly refer to as a "relay" (my dad called it a flasher can) is actually something quite different in its original form as used in the coupe. It's fiendishly simple but they do go bad sometimes. It's just a piece of filament wire spiraled around a bimetalic contact strip that temporally shorts out the filament when it gets hot, but only for a blink because as soon as the lights come on the filament that was heating up the strip starts cooling down and the bypass contact opens up again, heating up the filament. The blink interval is dependent on all sorts of things, including the bulbs used, harness resistance, terminal and socket corrosion. You can still the old fashioned kind made by CEC for about $10 US and it works fine in our cars. The first few minutes of this video explain it I better than I can.
 
Berkautobarn said:
Hey Everyone, I am having this occurrence on my 1974 3.0 cs when you switch the blinker on it just stays on and does not pulse. It happens on both sides. I am wondering if the mechanism is grimy and needs to be cleaned or if it’s a further wiring issue.

Any thoughts here? Thank you
Click to expand...
Do the emergency flashers work?
 
Catbert said:
If you received your new relay, did it fix the problem? Ask me why I care? :cool:
Click to expand...
The new relay came in and did not change anything unfortunately. I have not had time to diagnose more but will dive into it this weekend. I think it is certainly worth trying a new one if you are having the same issue.
 
If you have a test probe which I have found tremendously useful for sorting electrical issues you can follow the connections down and fire 12v at various points and quickly see where the break is. If you added an electronic flasher relay make sure the connections are correct as mine did not work at first but was my fault for reversing a connection (I'm sure you did but always worth double-checking.)
 
Sean Haas said:
If you have a test probe which I have found tremendously useful for sorting electrical issues you can follow the connections down and fire 12v at various points and quickly see where the break is. If you added an electronic flasher relay make sure the connections are correct as mine did not work at first but was my fault for reversing a connection (I'm sure you did but always worth double-checking.)
Click to expand...
That's what's great about the old-fashioned flasher cans, hookup is foolproof.
 
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