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LED flasher

JayTheCPA

Well-Known Member
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Location
Annapolis, MD
#2
Just curios: what happens if the filament bulb goes back in? Perhaps the circuit board in the rear is shorting?


IIRC, mine did not quick flash until I replaced both the front and back signal lights with LED's. With just LED's in the back, the flashing cycle remained normal. Cure to the quick flash was a LED rated blinker relay.

Only down-side to a LED rated blinker relay is it does not do the long first signal and goes straight to the normal cycle flashing.
 

MrMarty51

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Miles City, Montana
#3
I don't think the LEDs draws enough amperage to heat up the flasher unit enough to allow them to flash. I think there is a resister that can be added to each side that`ll make them flash.
 

JayTheCPA

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#5
For systems that are not compliant with LED's, the resistor is for adding load that the LED does not have. Even without the resistor, the system should still do a 'quick-flash' (aka: hyperflash) just like it would do if the filament blew.

In this case, there is no blink going on which I am interpreting as zero illumination. If correct, I suspect a voltage leak that is enough to take down the voltage, but not enough to blow the fuse. Another possibility (again, presuming that there is zero illumination) is that the new LED is bad and causing the behavior through an internal short.
 

JayTheCPA

Well-Known Member
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Location
Annapolis, MD
#8
Gotcha. Seems that the system is not working normally anyway and suspect the existing flasher relay is going bad.

If it goes back to working normally with a filament bulb, chances are good that either a resistor or LED compliant flasher relay is the cure. Given a choice, I'd go for the new flasher relay as it will cure all locations at once.
 
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