Fast Blinker
Safety Car
Joined: Sep 2005
Posts: 4,062
Likes: 103
From: Southeast, Tennessee
St. Jude Donor '09 thru '26
but it can also be caused by a bulb socket that might be a bit corroded and not making good contact (making it appear that the bulb is bad by changing the current draw). of course the flasher could be bad, but that isn't usually the case.
Melting Slicks
Joined: Apr 2006
Posts: 2,211
Likes: 64
From: Bocabec, New Brunswick
In the old days of bimetallic blinker modules a slow or no blink was usually a burnt out bulb. A fast blink could be a wrong bulb, a short of some kind or more bulbs added to the circuit than normal, like connecting trailer lights for example. This is because the blink rate was controlled by how quickly the bimetallic strip heated, distorted and disconnected the power to the bulbs. Not enough bulbs (i.e. a burnt out one), not enough current draw and the strip didn’t heat enough to distort and disconnect; too many bulbs or a short, too much current draw and the strip heated too fast.
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Melting Slicks
Joined: Jun 2009
Posts: 2,343
Likes: 4
From: Anderson SC
In the old days of bimetallic blinker modules a slow or no blink was usually a burnt out bulb. A fast blink could be a wrong bulb, a short of some kind or more bulbs added to the circuit than normal, like connecting trailer lights for example. This is because the blink rate was controlled by how quickly the bimetallic strip heated, distorted and disconnected the power to the bulbs. Not enough bulbs (i.e. a burnt out one), not enough current draw and the strip didn’t heat enough to distort and disconnect; too many bulbs or a short, too much current draw and the strip heated too fast.
-W
Melting Slicks
Joined: Apr 2006
Posts: 2,211
Likes: 64
From: Bocabec, New Brunswick
You can buy electronic replacement flashers to replace the original which would be a good idea if the flash rate problem was due to additional bulbs or brighter ones as you suggested; but would perhaps mask a burnt bulb or short issue which should be repaired.
Burning Brakes
Joined: Jun 2006
Posts: 1,148
Likes: 5
From: South Dakota
When you check your bulbs, look at the pointed end real close. Sometimes, the tip wears to a concave shape. The bulb still works when tested, but the contact to the socket is compromised and the bulb needs to be replaced.
Drifting
Joined: Aug 2010
Posts: 1,839
Likes: 45
From: nassau co. new york
mine was slow,then stopped working,then i cleaned the push terminals and it was fast and then it started working sometimes.i will replace it with a louder unit so i don't ride around with the blinkers on all the time.(old man sign) 
