LED Signals....relay

I put a set of LED signals on my bike, they won't flash with the original flasher. I picked up an electronic flasher from Napa, I'm assuming it will work, but I'm curious if anyone has ever put one in, this relay has three prongs where the original is only two. I'm assuming the third prong is for a ground?

There should be 3 terminals on the relay... Keep in mind, depends on the relay for as in the OEM relay, 2 terminal.... LED non load sensing designs are what you want....

1 for +12Vdc (switched off ignition switch)
1 for ground
1 for LOAD... This is you control switched led turn indicator...

Tridon relays... Most auto parts store carry them if anyone else is interested....

www.tridon.com.au/Products/Product.aspx?SG=8&S=35&G=478&P=2000

Here's how I did my 900...

I have attempted to use a three prong relay with no success. The third prong is a ground and is normally used to activate a solenoid "clicker" Let us know how you fair. The problem I have found with the relays I have tested is that they work fine up to about 12.5V. Once you start to approach 12.8V and go even further they start to flash so fast that they no longer flash and actually flicker. My system charges at almost 15V and once the engine is running the relay is unusable. While the engine is off the flashers work fine. I use one on ma LED running light because it pulses it at about 6-7 pulses a second.

So, OMR, did you simply plug the two wires in and run a ground wire on the third prong? No resistors or such have to be used? Also, you say that the relay should be a non-load sensitive type. The one pictured and the one that I bought say that they are load sensitive. Do you know a part number for the correct relay in non-load sensing?

KZ turn signal relays work a little different regarding the ground.... or in the manner most relays work with switched + voltage or ground activating the relays....

Right out of the manual, can't explain it any better then this... See red boxed text....

madmatt1 wrote:

I put a set of LED signals on my bike, they won't flash with the original flasher. I picked up an electronic flasher from Napa, I'm assuming it will work, but I'm curious if anyone has ever put one in, this relay has three prongs where the original is only two. I'm assuming the third prong is for a ground?

I believe that's correct. A standard unit is a bimetallic metal strip in series with the bulb, so you only need two lines: power in and power out to lamp. The electronic ones are run by 12V (power in) and drive the bulb on power out, but would need a ground for the timer circuitry to be able to run correctly. It's my understand that the solid state relays contain no mechanical relays, they use a 555 timer and a FET or some solid state device as a switch. A relay alone is probably not going to work unless there is some circuitry to run it.

"So, OMR, did you simply plug the two wires in and run a ground wire on the third prong? "

Yes... The EP35 is a 3 wire device, plug it in as depicted in the drawing and mentioned in text.... This unit worked due to 21 watt load/current sensing of my LED signals.... May not work for yours....

"No resistors or such have to be used?"...
Non what so ever.... Not required...

"Also, you say that the relay should be a non-load sensitive type. The one pictured and the one that I bought say that they are load sensitive.

Do you know a part number for the correct relay in non-load sensing?"....

Already provided.... Tridon LED-4...

There's many options out there for relays if you know the current totals of your turn signals... Find the ones that depict no load/LED sensitive and you should be fine....

Most motorcycle shops carry non resistor type relay flashers as well.... If you have a Cycle Gear shop around, they have them there as well.....

Try to stay away from the "Include resistor" packages for this is one of the reasons you went LED is it not, to reduce current demands in an old wiring harness/electrical system....

Good luck...

OMR

Cycle gear....

www.cyclegear.com/spgm.cfm?L1=5000&L2=7&...=&item=PRC_SM-FRH1_G

On a KZ900....
The red would terminate to switched +12Vdc
The black to your Orange from turn signal hand control...

I don't know what my deal is, but when I put LED turn signals on the original relay worked fine for the turn signals, I didn;t have to swap it out. I found that my 4 way flashers didn't work though. I just got in from a 2 hour ride in the pouring rain and thought I would try out my flashers just for the heck of it, and they worked! For some reason when my RPMs are above 3000 the 4 ways work too...did I just get lucky, or is the J bike electrical system just better than the old kz system?

Simple OHMS law may provide an answer...

The relays are designed for +12Vdc operations...
The KZ voltage increases above this at higher rpms ~+14Vdc...

With that in mind and for simplicity...
Lets say your initial non working situation/load/current demands is at 6 ohm load.... but your relay is rated at a minimum of 2.2 amps...

12Vdc/6ohms = 2 amps obviously no worky....

But at 14Vdc/6ohms it now equals 2.333 amps where now the relay is operating within specifications thus worky....

OHM's law, never fails... Just the way it works folks....

And yes Adam... OHM's law works in Canada as well.... :laugh: :laugh:

Thanks for all the help. I think I'll be able to figure this out....trial and error, if need be. And I'll be sure to share what I learn

I bought a two prong flasher from "Superbright LEDs" and it works perfectly. Straight plug-N-Play.
www.superbrightleds.com/cgi-bin/store/in...pecs/CF12ANL-01.html