Affordable LED turn signals?

ihacker , well you could, but you might as well just remove the stubs, but 6 of one, half dozen of the other... this will work also!! Nice you sourced the resistors off Amazon, easy to buy there!! Well done lad!!

 

I was able to get my lights working after some more research. Passing on the knowledge to hopefully help other people making this modification.

1. The metal hoops that are either being replaced or shaved down are called Current Sensing Resistors or shunt resistors HERE IS A LINK for reference.
2. The amount of resistance needed depends on the LED lights you are using for your turn signals.
3. On the Flasher Module board RS1 is the Drivers side and RS2 is the Passenger side turn signals.
4. When the resistance is too low (not enough) you will have hyper flashing. When the resistance is too high, the flashers simply stop working, or blink once then stop working.
5. Turn signals need to be tested with the vehicle running, and with the headlights On and Off.
6. Two identical resistors in parallel have an equivalent resistance half the value of either resistor. The current splits equally between the two. LINK

Read this to understand the flasher module and the modifications.

 

On my 2017 this is what worked for the LEDs I am using.

Front Turn Signal LED -

LASFIT 3157 LED Turn Signal Light 3057 4157 Blinker Bulb with CANBUS Anti Hyper Flash No Load Resistor Need 2023 Upgraded Standard Socket Automotive Version- Bright Amb

LASFIT 3157 Amber
Rear Turn Signal LED -

$16 LASFIT 921 912 LED Bulb Red, Third Brake Center High Mount Stop Light, Canbus Error Free T15 906 904 W16W LED Bulb Red 3rd Brake Tail Lights For Cars/Truck, 300% Bright, Pack of 2

LASFIT T15 Red

Flasher Module Modifications - I removed the upper half of both current sensing resistors. I ended up soldering two .15 Ohm 2 Watt resistors in parallel on both RS1 and RS2 (total of four resistors used). Given that two identical resistors in parallel have an equivalent resistance half the value of either resistor, I should have about .075 Ohm resistance on each side.

Resistors -

$9 uxcell 30Pcs 0.15 Ohm Resistor, 2W 1% Tolerance Metal Film Resistors, Lead, 5 Bands for DIY Electronic Projects and Experiments

Uxcell 0.15 Ohm 2 Watt Resistor

 

I have a 2018 Tundra SR5, Double Cab, 6'7" Bed, 5.7L V8 w/ LED Headlights and I can't seem to find the relay module shared throughout this post and in the other tundratalk post. I've attached a picture of my BCM with other modules next to it. I can hear the relay in one of those, but before diving more into it, I'm wondering if the resistor trick will work for my year/model?

Any help would be greatly appreciated!

Thank you!

 

2018+ models have a upgraded electronic system and no longer use the old school flasher relay and resistors aren’t required in this trucks they work normally with any LED bulbs

 

Thank you for the reply!

I replaced all 4 flashers with LEDs and have hyper flash happening. Because I swapped all 4, do I need to add resistors to the rear flasher LED?

Again, thank you for the help!

 

FWIW, I replaced with the following LEDs:

*

LASFIT 7443 LED Bulb CANBUS Ready 7444 T20 Turn Signal Light Front or Rear Blinker Anti Hyper Flash No Load Resistor Need Upgraded Intelligent Temperature Control Version Amber Yellow (2 Pack)

Front Turn Signal: LASFIT T-7443A (Amber)
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$26 LASFIT 921 LED Bulb Red Third Brake Light, Canbus Ready 912 T15 Center High Mount Stop Light Replacement Anti Hyper Flash Fit for Ram F150 Silverado Sierra Camry Tundra Wrangler Pickup Truck, 2pcs

Rear Turn Signal: LASFIT T-T15R (Red)

 

Yes probably need to install resistors in the rear only

 

Thanks for the advice, I'll order some up and get them installed ASAP.

I was also doing a bit more reading on LASFIT site and they say that the front turn signal LEDs I bought (T-7443A) will cause hyper flash on the 2018 Tundra. Maybe I need to replace those too.

 

I have a 2011 Tundra with the OEM headlights that I am looking to upgrade to the Alpha Rex Luxx. From what I see, the Luxx's for my year/model retain the halogen bulb for the turn signals, everything else is an LED. I am wondering if I can upgrade those turn signal halogens to LEDS. Has anyone done this? If so, what did you go with? Thanks.

 

Reviving an old thread. You installed two .15 ohm resistors in parallel to give you .075 ohms (750milliohms) and not hyperfalsh with truck running and headlights on. What led bulbs are you using? I installed .15 ohms resistors and will get hyperfalsher very occasionally with the headlights on and truck running.

 

I was curious about this as well. I started to install the ibrightstar 3157 amber bulbs in my front OEM housings, and when I went to install the second bulb, it would not illuminate. Going to do the modification, but need to figure out what resistors to replace in the relay board. I was going to put the ibrightstar 3157 ambers in both front and back turn signals. I know they are rated at 3W when flashing, so need to factor that in. Anyone have any recommendations? Thanks in advance!

 

I'm still at a loss on what ohms are required to stop the hyper flash. I used .15 ohms resistors for wach side and they work but when the headlights are on every once in a while I get a hyperflash. I'm thinking .18 ohms to .2 ohms. I'm using very low resistance led bulbs front and back.

This is what I'm using now which isn't quite enough resistance.

 

Installed 2 .22 ohm 3W resistors and NO more hyperflash! All function great with engine on/off and all headlights on/off.

 

I meant to let you know I solved the issue and started a new thread on it. I actually bought the same front led bulbs you mentioned because they are brighter then mine. Bought some .18 and .2 ohm resistors 3W. I settled on the .2 ohm resistors which worked perfect. The .18 ohm resistors did hyperflash once with the headlights on. So it's confirmed that .2 and .22 ohm resistors work.