How to: flasher relay for LED turn signal

[BBS360]

There are some photos showing the relay plug location in the first post of this thtead.
It's the circled connector in the first photo.

 

[Pepe116]

This is a great and easy fix. Thanks for putting it up. It saved me a huge headache. I just spliced the green/yellow back to the black/ground wire on the flasher cancelling plug. It tucks up very nicely under the seat.

 

[Keenan]

Hi I just tried to follow these steps and I did not have any success. It’s worse than before. I installed the new relay and grounded the yellow/green wire, but now the blinkers are very dim and still stay solid. The stock relay is brighter. Very confused, anyone have any ideas?

 

[BBS360]

Is the pinout on the new relay the same as the stock one?
Which relay are you using?

 

[Keenan]

It’s an novita ep 34. 3 prong just like the stock one

 

[arfstrom]

I am suspicious of the turn signal light cross over. (idk if you have a newer bike than 81, that would not be the issue then. see post 16. LED's turn out to be super sensitive to any electical pulse/current. and the turn signal will bleed power from left to right. which a diode kit will block that small power transfer.
( I am just guessing) easy to to check, pull out the flasher bulb. (I think, its been 3 years since I did this update)
http://www.xs400.com/threads/how-to-flasher-relay-for-led-turn-signal.10601/#post-150085

 

[Keenan]

I have an 81. But yeah idk, guess I’ll just have to keep messing with it. Just frustrating

 

[arfstrom]

This one is missed named, but it may have some info your missing, (I still couldn't get my auto cancel to work, but that could be do to user error)
http://www.xs400.com/threads/successful-led-signals-with-auto-cancel-and-no-resisters.7175/

 

[Gumby1981]

Hey guys I have an 1981 400sx and I did this relay mod. I have a universal led bar. It works but I am having the hazard issue. I’m confused where the diodes go exactly. Can anyone clarify?

 

[XSLeo]

I edited this post because I made up diagram showing the diodes and how they wire in.
Find the wires going to the turn signal indicator. One lead will be dark green the other chocolate. These leads come from the left and right sides. Cut them off about half way between the bulb and connector.
If you are using the stock bulb polarity won't matter.
A diode is a one way valve for electricity. On the diodes, in my diagram they are shown as an arrowhead with a line across the point. This arrow head points to the direction of flow. In real life they have black body with a grey line around it near one end. This shows you which way the power flows, the banded end is the output end.
Hook the to outputs together and hook these to one wire to the indicator bulb. Ground the other wire from the indicator bulb.
Hook the other ends of the diodes to the left and right turn signal wire.
Now if you use a LED indicator bulb then you might have a polarity issue. Some LED's work only if power flows the right way. Some don't. Find the positive lead of the LED. Hook this lead to where the outputs from the two diodes come together.
Leo

 

[Gumby1981]

Thanks Leo. Turn signals are working perfectly! I was just confused earlier by the term “indicator” as a turn signal light is often referred to as a turn indicator. I also discovered that simply removing the bulb from the dash light corrects the hazard problem... (lame solution) I wired in the diodes because having the dash light working is very nice and helpful. Thanks for the info everyone!

 

[fatherxmas89]

after seeing many threads about led turn signals and having issues with them not working and staying on, and seeing so many different answers and responses i decided to add led brake and turn signals to my bike and record the process and take pictures and make it as easy as possible for all to follow!!! now my bike is a 1980 yamaha xs400s
*NOTE YOU WILL LOSE AUTO CANCEL

First off it is easy folks, dont worry, 15min-1hour depending on how much u have to take off to access the relay!!!!

Materials needed:
tridon ep-34 signal flasher(advance auto parts $12.99)plugs right in, no switching required
6-10 inches wire, same gauge as factory
o-ring connector(crimp or solder on)
heat shrink tubing
soldering supplies
beer

now the steps

1)remove all that is needed to access the flasher relay and battery, maybe you can access it with removing just the tank or maybe u need to take off more stuff, depending on the "stockness" level of your bike but here is where u need to get to.


2) unplug your stock flasher relay and plug in the tridon ep-34 flasher relay


3)peel back/cut(CAREFULLY)the covering on the wires going to the flasher relay. Cut the yellow/green wire(ground) going to the flasher relay plug, the end of the wire going to the wiring harness needs to be capped or covered so a bare wire is not exposed. Heat shrink tubing can b used and pinched at the top when heated, or electrical tape. The other end of the yellow/green wire that goes to the flasher relay plug needs to be extended to reach a grounding bolt(i used the one by the battery) Solder on a section of wire the end coming out of the flasher relay and cover it with shink tubing



4)crimp on or solder on a o-ring connector to the extended yellow/green wire coming from the flasher relay plug and connect it to ground(i used location by battery)


5)test your turn signals!!! everything should work, it did for me first time, took about 15min with a buddies helping hands!!! finish beer and put bike back together and enjoy your flashing led turn signals


Any questions, comments, things i could change on my how-to, help, feel free to pm me!!!

I did this on my 79 xs400f and have no signals now....

 

[fatherxmas89]

after seeing many threads about led turn signals and having issues with them not working and staying on, and seeing so many different answers and responses i decided to add led brake and turn signals to my bike and record the process and take pictures and make it as easy as possible for all to follow!!! now my bike is a 1980 yamaha xs400s
*NOTE YOU WILL LOSE AUTO CANCEL

First off it is easy folks, dont worry, 15min-1hour depending on how much u have to take off to access the relay!!!!

Materials needed:
tridon ep-34 signal flasher(advance auto parts $12.99)plugs right in, no switching required
6-10 inches wire, same gauge as factory
o-ring connector(crimp or solder on)
heat shrink tubing
soldering supplies
beer

now the steps

1)remove all that is needed to access the flasher relay and battery, maybe you can access it with removing just the tank or maybe u need to take off more stuff, depending on the "stockness" level of your bike but here is where u need to get to.


2) unplug your stock flasher relay and plug in the tridon ep-34 flasher relay


3)peel back/cut(CAREFULLY)the covering on the wires going to the flasher relay. Cut the yellow/green wire(ground) going to the flasher relay plug, the end of the wire going to the wiring harness needs to be capped or covered so a bare wire is not exposed. Heat shrink tubing can b used and pinched at the top when heated, or electrical tape. The other end of the yellow/green wire that goes to the flasher relay plug needs to be extended to reach a grounding bolt(i used the one by the battery) Solder on a section of wire the end coming out of the flasher relay and cover it with shink tubing



4)crimp on or solder on a o-ring connector to the extended yellow/green wire coming from the flasher relay plug and connect it to ground(i used location by battery)


5)test your turn signals!!! everything should work, it did for me first time, took about 15min with a buddies helping hands!!! finish beer and put bike back together and enjoy your flashing led turn signals


Any questions, comments, things i could change on my how-to, help, feel free to pm me!!!

I did this on my 1979 xs400f and know I don't have any working indicators....