LED turn signal hyper flash fix

Joined
Sep 14, 2005
Messages
2,741
Location
The NW, Cascade Mountian Range
Visit site
I installed some front LED turn/ park indicators. Naturally it flashed faster than it should. I did some research and found that if you remove ( or clip one leg) a resistor in the factory relay, it'll flash at normal speed.

I did this on my 86 4Runner and it worked.
Here are the pics:

IMG_20200419_141725038.jpg
IMG_20200419_141725038.jpg
IMG_20200419_144907_915.jpg
 
Joined
Jan 31, 2011
Messages
861
Location
Loomis, California
Visit site
Nice. I remember reading this tech article in my 4wdtoyota magazine but have since forgotten which resistor to cut. I just decided to ignore my hyper flash but I think now I’ll correct it. Appreciate the write up.
 
Joined
Aug 2, 2006
Messages
4,411
Location
Jefferson
Visit site
It has something to do with current running a different route through the flasher so you know you have a light out.
Cutting the resistor eliminates the "warning" circuit in the flasher. Or something to that effect. :flipoff2:
 
Joined
Aug 22, 2015
Messages
1,574
Location
Ohio
Visit site
I think this is a holdover from when flashers were bi-metalic strips that heated up when current passed thru. They heated up and bent opening the circuit. Then they cooled, closed up and made the circuit again. This also made the old school blinker sound under the dash. When a bulb burned out the current drops, the strip doesn't heat up as much and closes faster. Hyperflash. And it let you know a bulb burned out.

Generally speaking I just go to a led flasher so I can control the blinky speed to what I want.
 

ntsqd

technerd
Joined
Apr 26, 2007
Messages
6,127
Location
Upper So. CA
Visit site
Generally speaking I just buy the HD electronic flasher instead of the std bi-metal replacement flasher. Hyper-flash occurs because of how fast the bi-metal heats up due to the low "bulb" resistance. Electronic flasher doesn't care what the load is, it flashes the same. Sometime these are labeled as being for towing trailers.
 

Users who are viewing this thread

Top Bottom