User Tag List

Reply
 
Thread Tools Rate Thread Display Modes
Old 05-31-2015, 09:34 PM #1
utmba95 utmba95 is offline
Member
 
Join Date: Dec 2009
Location: Austin, TX
Posts: 79
utmba95 is on a distinguished road
utmba95 utmba95 is offline
Member
 
Join Date: Dec 2009
Location: Austin, TX
Posts: 79
utmba95 is on a distinguished road
LED mod for 12-Pin turn signal flasher relay w/DRL

I have not seen any instructions for modifying this relay to use LED bulbs. I ONLY CHANGED OUT THE FRONT TURN SIGNALS TO LEDS, so these instructions may not work if you want to run rear LED bulbs too. I changed mine because the DRLs run so hot they burn up the bulb connector and bulb. I bought cheap bulbs from e-bay and had to file down the base so the width would fit.

12 Pin turn signal flasher relay with DRL (toyota P/N 81980-35020 Denso P/N 066500-5570)

It worked on my 2003 and 2004 4Runners.

Here are the steps:
1. Remove relay (instructions)

2. Remove relay cover

3. Desolder R4 (200 ohm resistor marked 201. 201 = 20 followed by 1 zero) You can alternately heat the sides of the resistor with a soldering iron until it comes off.

4. Replace R4 with approximately 1.8K resistor. I used 1.82K. Ideally you have a size 2010 (5mmx2.5mm) resistor like the original, but I used a 1206 since it was all I had. I had to bridge the solder across gaps to make it fit. I determined this value by soldering on a 10K potentiometer and turning it both directions with the turn signal on. One direction the signal will fast blink, the other direction it will go crazy and then stop blinking. Measure the resistance at both extremes and then take the average for the new value. Note that you have to unplug the relay to measure the resistance as the resistor has voltage on it even when ignition is off, and this messes up the resistance measurement. I didn't measure the voltage to calculate the power, but 1/16th Watt is more than enough for 1.8K.

5. solder a new resistor for R4 (1.82K may work for you)

Here's my debugging in case anybody else wants to improve upon it.

There are probably 3 ways to hack this relay module for LEDs.
1. Change shunt. My guess is you could just exchange the 19milliOhm resistor with one twice as large if you run incandescents in the back. I didn't have such a resistor and didn't want to try to make one. You need the voltage drop to equal 75mV for the amount of current in one front and one back light. If you change the shunt, you also need to consider if it can dissipate all the power if somebody puts in incandescent bulbs.
Measurements courtesy of VE7OSR
2. Change R4 which sets the current sense level. This is what I did. However, I suspect this may not work for LEDs in front and back as the voltage drop across the stock shunt would be almost immeasurable. You could change R4 as well as the shunt to fine tune.
3. Possibly lift pin 1 of IC1 and fine tune a voltage about 75mV less than pin 2 to simulate the proper voltage drop across the shunt. I did not try this, and it would prevent detection of a failed bulb.
I deduced what I could of IC1 - Denso SE336
1 = Right indicator out
2 = VCC (12V)
3 = Left indicator out
4 = Right indicator in
5 = Left indicator in
6 = current sense level adjust (via resistor to ground) Originally 200 ohm
7 = no connect (9V when ignition on)
8 = Hazard indicator in
9 = ? (5V when ignition on)
10 = current sense (measures voltage drop from VCC across shunt)
The "indicator in" signals connect to the turn signal switch and hazard switch. They are pulled up to 12V when off and pulled down through resistors to 3.5V when on.
Attached Images
LED mod for 12-Pin turn signal flasher relay w/DRL-20150531-4runner-turn-signals-3-jpg  LED mod for 12-Pin turn signal flasher relay w/DRL-20150531-4runner-turn-signals-7-jpg 
utmba95 is offline   Reply With QuoteReply With Quote
Old 07-29-2015, 04:40 PM #2
raptorRunner01 raptorRunner01 is offline
Junior Member
 
Join Date: Jun 2015
Location: Texas
Posts: 21
raptorRunner01 is on a distinguished road
raptorRunner01 raptorRunner01 is offline
Junior Member
 
Join Date: Jun 2015
Location: Texas
Posts: 21
raptorRunner01 is on a distinguished road
Has anyone else run this fix for hyper flashing leds? I've got a 2003 SR5 with factory DRLs and the associated 12-pin relay. Already tried resistors before the individual bulbs (only 2 up front) and that didn't work. Can't replace the 12-pin with the tried and true EP35 so I'm out of ideas. Is this solution still the best fix?

OP - any updates as to how this has worked for you or suggestions on how to do it? Thanks!
raptorRunner01 is offline   Reply With QuoteReply With Quote
Old 07-29-2015, 04:52 PM #3
Mikep. Mikep. is offline
Member
 
Join Date: Sep 2012
Location: PNW
Posts: 206
Mikep. is on a distinguished road
Mikep. Mikep. is offline
Member
 
Join Date: Sep 2012
Location: PNW
Posts: 206
Mikep. is on a distinguished road
I was there when I did my facelift, I switched all the front indicator bulbs to led. I did a lot of digging, but found close to nothing on the matter. I was originally going to solder in a pot, but had trouble finding one within the range that I needed. I do not remember what forum it was, not this one, I stumbled upon a thread where someone filed down the factory bar resistor. This is what I did, I actually used a bench grinder (VERY carefully of course). It has been working flawlessly ever since. It works completely as it should, if I unplug a bulb front or rear, it will hyperflash, so I will know if a bulb goes out. I ended up grinding about half off the factory bar, which is not the conventional style resistor, basically just a metal bar. I have an 03 limited with factory DRL's. I tapped both the upper and lower turn signals on the same circuit, the DRL's have been disabled for a long time before I did this. Rear bulbs are stockers still.
Mikep. is offline   Reply With QuoteReply With Quote
Old 07-29-2015, 05:39 PM #4
utmba95 utmba95 is offline
Member
 
Join Date: Dec 2009
Location: Austin, TX
Posts: 79
utmba95 is on a distinguished road
utmba95 utmba95 is offline
Member
 
Join Date: Dec 2009
Location: Austin, TX
Posts: 79
utmba95 is on a distinguished road
The mod worked well, but unfortunately the cheap Chinese LED bulbs I bought off of ebay didn't. They aren't designed to handle the heat of running continuously, and I melted 4 of them in two different styles. Both had a diode in series with the LEDs that overheated and melted the base.

Rather than sink more time and money, I went back to incandescent.
utmba95 is offline   Reply With QuoteReply With Quote
Old 07-30-2015, 12:49 PM #5
raptorRunner01 raptorRunner01 is offline
Junior Member
 
Join Date: Jun 2015
Location: Texas
Posts: 21
raptorRunner01 is on a distinguished road
raptorRunner01 raptorRunner01 is offline
Junior Member
 
Join Date: Jun 2015
Location: Texas
Posts: 21
raptorRunner01 is on a distinguished road
Quote:
Originally Posted by Mikep. View Post
I was there when I did my facelift, I switched all the front indicator bulbs to led. I did a lot of digging, but found close to nothing on the matter. I was originally going to solder in a pot, but had trouble finding one within the range that I needed. I do not remember what forum it was, not this one, I stumbled upon a thread where someone filed down the factory bar resistor. This is what I did, I actually used a bench grinder (VERY carefully of course). It has been working flawlessly ever since. It works completely as it should, if I unplug a bulb front or rear, it will hyperflash, so I will know if a bulb goes out. I ended up grinding about half off the factory bar, which is not the conventional style resistor, basically just a metal bar. I have an 03 limited with factory DRL's. I tapped both the upper and lower turn signals on the same circuit, the DRL's have been disabled for a long time before I did this. Rear bulbs are stockers still.
Ha! I think I found that exact same post you're talking about. I was wondering how well that mod worked. Makes me nervous since it's such a permanent mod but I guess if it ever fails, you could just always buy a new relay at the stealership and be back to normal. Question though - why did you have to disable the DRL's for this to work? Also, what do you mean by tapping the upper and lower turn signals on the circuit? I thought we only had the lower turn signals in the bumper as active? Thanks!
raptorRunner01 is offline   Reply With QuoteReply With Quote
Old 07-30-2015, 12:56 PM #6
Mikep. Mikep. is offline
Member
 
Join Date: Sep 2012
Location: PNW
Posts: 206
Mikep. is on a distinguished road
Mikep. Mikep. is offline
Member
 
Join Date: Sep 2012
Location: PNW
Posts: 206
Mikep. is on a distinguished road
I had the same reservations about modifying the stock piece, but if you go slow and are careful you will be fine.
I did not need to disable the drls for this to work. I disabled them when I first got the car, I just thought it was worth mentioning considering it is related to the parking lights.
Correct, ours from the factory only have turn signals in the bumper, but when I did the facelift (06+ headlights), I wanted the turn signals in the new headlights to function with the stock ones in the bumper so I linked them together.
Hope this helps.
Mikep. is offline   Reply With QuoteReply With Quote
Old 07-30-2015, 01:46 PM #7
Krayziekid's Avatar
Krayziekid Krayziekid is offline
Member
 
Join Date: Jul 2015
Location: CT
Posts: 934
Real Name: Jake
Krayziekid will become famous soon enough
Krayziekid Krayziekid is offline
Member
Krayziekid's Avatar
 
Join Date: Jul 2015
Location: CT
Posts: 934
Real Name: Jake
Krayziekid will become famous soon enough
Quote:
Originally Posted by Mikep. View Post
I had the same reservations about modifying the stock piece, but if you go slow and are careful you will be fine.
I did not need to disable the drls for this to work. I disabled them when I first got the car, I just thought it was worth mentioning considering it is related to the parking lights.
Correct, ours from the factory only have turn signals in the bumper, but when I did the facelift (06+ headlights), I wanted the turn signals in the new headlights to function with the stock ones in the bumper so I linked them together.
Hope this helps.
Quick question, cause I am about to do the 06 headlight facelift. Do you have any pics of the install, or your current wiring?

So did you simply splice into the power and ground coming up from the bumper and put an amber bulb into the turn signal socket up top in the new 06 lights? Do those top bulbs also function as DRLs?

And finally, do you know if it is possible to get a second DRL 12 pin relay thing? I want to try grinding it down or sanding it down somehow, but I am not too keen on doing it on my stock one. I'd much rather have a backup I can play with and swap out if it works. Sorry for all the questions.
Krayziekid is offline   Reply With QuoteReply With Quote
Old 07-30-2015, 04:49 PM #8
Mikep. Mikep. is offline
Member
 
Join Date: Sep 2012
Location: PNW
Posts: 206
Mikep. is on a distinguished road
Mikep. Mikep. is offline
Member
 
Join Date: Sep 2012
Location: PNW
Posts: 206
Mikep. is on a distinguished road
Quote:
Originally Posted by Krayziekid View Post
Quick question, cause I am about to do the 06 headlight facelift. Do you have any pics of the install, or your current wiring?

So did you simply splice into the power and ground coming up from the bumper and put an amber bulb into the turn signal socket up top in the new 06 lights? Do those top bulbs also function as DRLs?

And finally, do you know if it is possible to get a second DRL 12 pin relay thing? I want to try grinding it down or sanding it down somehow, but I am not too keen on doing it on my stock one. I'd much rather have a backup I can play with and swap out if it works. Sorry for all the questions.
I do not have any pictures of the wiring or the install, just the finished product. Very basic install though. I picked up the bulb sockets for the new turn signals in the headlights and tapped them into the factory ones in the bumper. My DRLs are disabled, the top bulbs function exactly as my lower ones do.
You can get a second flasher either from the dealer or salvage yard. A dremel with a sanding drum would probably be the tool of choice for this. Just take it slow and file it down a little at a time and you will be fine.
Mikep. is offline   Reply With QuoteReply With Quote
Old 07-30-2015, 06:13 PM #9
Krayziekid's Avatar
Krayziekid Krayziekid is offline
Member
 
Join Date: Jul 2015
Location: CT
Posts: 934
Real Name: Jake
Krayziekid will become famous soon enough
Krayziekid Krayziekid is offline
Member
Krayziekid's Avatar
 
Join Date: Jul 2015
Location: CT
Posts: 934
Real Name: Jake
Krayziekid will become famous soon enough
Quote:
Originally Posted by Mikep. View Post
I do not have any pictures of the wiring or the install, just the finished product. Very basic install though. I picked up the bulb sockets for the new turn signals in the headlights and tapped them into the factory ones in the bumper. My DRLs are disabled, the top bulbs function exactly as my lower ones do.
You can get a second flasher either from the dealer or salvage yard. A dremel with a sanding drum would probably be the tool of choice for this. Just take it slow and file it down a little at a time and you will be fine.
Ok thanks. Are they disabled on purpose? Or is that because of the new wiring? I'm trying to decide if upper and lower DRLs/turn signals are too much lol.
Krayziekid is offline   Reply With QuoteReply With Quote
Old 07-30-2015, 06:24 PM #10
Mikep. Mikep. is offline
Member
 
Join Date: Sep 2012
Location: PNW
Posts: 206
Mikep. is on a distinguished road
Mikep. Mikep. is offline
Member
 
Join Date: Sep 2012
Location: PNW
Posts: 206
Mikep. is on a distinguished road
Yes, they are disabled on purpose. I personally do not like the look of DRLs at all. Was one of the very first things I did to the car.
Mikep. is offline   Reply With QuoteReply With Quote
Old 05-25-2018, 02:38 PM #11
cmpt1 cmpt1 is offline
Junior Member
 
Join Date: May 2018
Location: GE
Posts: 2
cmpt1 is on a distinguished road
cmpt1 cmpt1 is offline
Junior Member
 
Join Date: May 2018
Location: GE
Posts: 2
cmpt1 is on a distinguished road
Quote:
Originally Posted by utmba95 View Post
I deduced what I could of IC1 - Denso SE336
1 = Right indicator out
2 = VCC (12V)
3 = Left indicator out
4 = Right indicator in
5 = Left indicator in
6 = current sense level adjust (via resistor to ground) Originally 200 ohm
7 = no connect (9V when ignition on)
8 = Hazard indicator in
9 = ? (5V when ignition on)
10 = current sense (measures voltage drop from VCC across shunt)
The "indicator in" signals connect to the turn signal switch and hazard switch. They are pulled up to 12V when off and pulled down through resistors to 3.5V when on.

In addition sample SE336 circuit
Attached Images
LED mod for 12-Pin turn signal flasher relay w/DRL-se336-jpg 

Last edited by cmpt1; 06-01-2018 at 09:34 AM.
cmpt1 is offline   Reply With QuoteReply With Quote
Old 06-30-2018, 10:01 PM #12
merlinrunner merlinrunner is offline
Junior Member
 
Join Date: Jun 2013
Location: Colorado Front Range
Posts: 27
merlinrunner is on a distinguished road
merlinrunner merlinrunner is offline
Junior Member
 
Join Date: Jun 2013
Location: Colorado Front Range
Posts: 27
merlinrunner is on a distinguished road
Has anyone got a wiring diagram showing which wires to splice into a load resistor for rear LED turn signal mods? Specifically for a '06 TFR. Been searching the posts but don't see anyone doing the resistor mod for rear turn signals. Maybe its in the "To hard to do category"? I can't use a 8 pin flasher...DRLs.
merlinrunner is offline   Reply With QuoteReply With Quote
Old 08-01-2018, 09:09 PM #13
thomaspuzio's Avatar
thomaspuzio thomaspuzio is offline
Member
 
Join Date: Dec 2009
Location: Chicago, IL
Posts: 46
thomaspuzio is on a distinguished road
thomaspuzio thomaspuzio is offline
Member
thomaspuzio's Avatar
 
Join Date: Dec 2009
Location: Chicago, IL
Posts: 46
thomaspuzio is on a distinguished road
Why isn't there a 12-pin LED flasher relay that we can just plug and play like all the other flasher relays out there? I can't believe to fix this we have to crack open the stock relay and break out the soldering iron. You're telling me NO ONE has made a part I cant just plug in??
__________________
That's bold talk for a one-eyed fat man!
thomaspuzio is offline   Reply With QuoteReply With Quote
Old 08-02-2018, 02:52 PM #14
bearisasquare's Avatar
bearisasquare bearisasquare is offline
Member
 
Join Date: May 2018
Location: Houston
Posts: 46
Real Name: Topher
bearisasquare is on a distinguished road
bearisasquare bearisasquare is offline
Member
bearisasquare's Avatar
 
Join Date: May 2018
Location: Houston
Posts: 46
Real Name: Topher
bearisasquare is on a distinguished road
Quote:
Originally Posted by thomaspuzio View Post
Why isn't there a 12-pin LED flasher relay that we can just plug and play like all the other flasher relays out there? I can't believe to fix this we have to crack open the stock relay and break out the soldering iron. You're telling me NO ONE has made a part I cant just plug in??
That is correct. I did this to my 2009 and now have LED's everywhere. This is the best and easiest solution i found

https://www.tacomaworld.com/threads/....244028/page-4
__________________
2009 Limited 4WD V6 Shadow Mica
ICON Stage 2 Kit SCS Ray10 17x8.5 BFG KO2 285/70r17
Rago Modular Storage Panels & Ditch Brackets * Prinsu Rack * Baja Designs Sqaudron Sports
KC Hilites Cyclones under hood * Blue Sea 12 Circuit Fuse Block * White LEDs Interior
Kenwood DMX906S Kenwood X802-5 Amp Infinity Front REF-6530cx & Rear REF-6532ex Pioneer TS-A2000LD2
bearisasquare is offline   Reply With QuoteReply With Quote
Old 08-23-2018, 04:24 PM #15
runadun1220 runadun1220 is offline
Junior Member
 
Join Date: Mar 2015
Location: Long Beach NY
Age: 39
Posts: 11
Real Name: Will
runadun1220 is on a distinguished road
runadun1220 runadun1220 is offline
Junior Member
 
Join Date: Mar 2015
Location: Long Beach NY
Age: 39
Posts: 11
Real Name: Will
runadun1220 is on a distinguished road
The flasher is a 12pin?!?!

Just so I understand, and before I go through doing all the work I'm just trying to understand. I've previously used the the resistors to cure the hyper flash on my 2004 4runner. They worked well for awhile until the wires corroded and got semi fried because of how hot the resistors get. So I bought a new flasher for LED's but from what I've seen it's 4 pin. Are all 4th gen 12 pin flashers? I bought the flasher from super bright LED's which I thought was pretty reputable. Is it possible the number of points are different in the 2006-2009 models opposed to the 2003-2005 models, while all 4th gens to have their differences when it comes to the drl/blinker set up. I guess my question has anyone removed the flasher in 2003-2005 model to find the flasher is a 4 or maybe 3 pin I haven't really looked, or are they all 12 pin flashers? Thank for the help.
runadun1220 is offline   Reply With QuoteReply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
2015 led turn signal flasher? Socal4RunnerTrail 5th gen T4Rs 48 07-07-2023 12:30 AM
4th gen flasher for LED turn signal mod 4RunnerFan 4th Gen T4Rs 28 02-28-2023 01:02 PM
HELP! Need Wiring Diagram for Flasher Module- Turn Signal Relay itsdchz 5th gen T4Rs 69 11-18-2019 05:46 PM
Going CRAZY here - WHERE is the turn signal flasher? Martinjmpr 3rd gen T4Rs 16 07-05-2017 03:35 PM
Turn signal and 4 way flasher problem. CaleWVU 3rd gen T4Rs 3 03-31-2008 12:45 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 02:37 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
***This site is an unofficial Toyota site, and is not officially endorsed, supported, authorized by or affiliated with Toyota. All company, product, or service names references in this web site are used for identification purposes only and may be trademarks of their respective owners. The Toyota name, marks, designs and logos, as well as Toyota model names, are registered trademarks of Toyota Motor Corporation***Ad Management plugin by RedTyger
 
Copyright © 2020