Scion202

maybe this should be sticky?

LED Turn Signals Without HyperFlashing DIY

Here is the LED vs Stock Bulb.
LED on right of course


If you want to swap your stock bulbs with any 7440 LED then you will run into hyper flashing problem that looks like this:



In order to fool the relay, you have to be able to simulate the stock bulb.
Stock bulb is roughly 22watts which draws ~2Amps of current

Most high powered LEDs will not draw any more than 0.2 Amps.....

Soooo

You have to use a resistor!

The resistor will have to be placed in parallel with the LED and draw ~2Amps

In order to draw 2 Amps you need a 6 ohm resistor. (Voltage = Current x Resistance)


Im not going to go into details that you dont really need to know...

Things you'll need:

2 LEDs

2 6-Ohm resistors rated for 50 watts or higher

(http://www.superbrightleds.com/cgi-b...dresistor.html)

2 wire splicers - Actually....NO! i was hyperflashing because the connection wasnt reliable so I soldered in the wires

Wires

Metal Zip-ties

Aluminum Heat Sink (recommended)

AND LOTTA LOTTA PATIENCE! THIS TAKES TOO LONG FOR SOMETHING SO SIMPLE, IMO THIS IS THE LEAST REWARDING MOD



The Resistor MUST be mounted to a sanded surface or a heatsink. No resistor by itself is rated for more than ~10watts. All high powered resistors are assumed to be mounted on a heat sink and it never get mentioned! A 50W resistor by itself will handle no more 3-5Watts. If heatsink is not used then the resistor can break down at any moment. It can result in a short circuit or a micro rapture from the inside. I understand that in most applications a turn signal will not be on for more than 5-10 seconds which will not get the resistor overly hot but over time it could still fail. Having the hazard lights on is primary reason for this precaution.

To give you some Idea: After 10-15 min of having hazards on, the temp of my resistor was 180 degrees F and the heat sink it is on was 120.


If you dedicated enough then keep reading...

Step1

Splice into the Positive lead on the socket only.


Step2

Find a location to mount the resistor. I picked the front bumper.

Step3

Sand the flat surface that the resistor will be touching or mount it to an aluminum heat sink.

(My friend had random aluminum heatsink around his house so I used em)

Step4

Connect the Resistor in parallel with the socket
-positive from the socket to one end of the resistor
-another end of the resistor can be grounded to anything on a car


Step5

Turn on and make sure that no hyper flashing is occurring


Step6

Mount the Resistor with metal zip ties to a chassis or the aluminum heat sink to a chassis.






other side:




Video of completed set up:




If you aren't discouraged to do the rears then YOU NEED TO GET A LIFE


YOU'RE DONE!

Jon

Good write up. I'll sticky it for now but eventually it will be moved to the DIY forum along with all the others.

Xander2011

I want to do this for my tC2 but...aghh seems too complicated. Was the removal of the front bumper cover necessary in order to complete the job?

Scion202

no the front bumper removal was not necessary. I just had it off at the time.

Scion202

some people do LED swaps to reduce the power consumption. Unfortunately in this case you pull the same amount of amps from the battery/alternator because of the resistor

BeloZero

so i finally found the flasher relay for the LED mods so you dont have to install all 4 of the load resistors. the new relay has the resistance needed to solve the hyper-flash issue.

the stock relay is a Tridon LM449

the replacement part number is 81980-55030 (toyota CF18 ALT). its a 8 pin relay and should say "for led" on the side. they have them on autolumination.com

if you replace this one relay for $15, you can save a lot of time doing each individual load resistor.

i am not 100% on the location of the relay but it sounds like its located in the juction box under the driver side dash on the left side. once i get the parts in and get them installed, ill update this post.