Author Topic: LED turn signal diode/ resistor help  (Read 9987 times)

Offline ARod

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LED turn signal diode/ resistor help
« on: April 11, 2012, 07:22:18 AM »
Hey, sorry for putting up another integrated tail light thread but I am looking for a more specific answer then I have found in the old threads. I installed an LED integrated tail light and the brake/ run light are working perfect, but the turn signals both go on at the same time. I read on the older threads I need a diode or resistor. I picked up a 50v 1a (1n4001) diode and when that didn't work I tried a 10w 50-ohrm resistor after talking to the guy a radio shack. Unfortunately it still doesnt make a difference. Can someone tell me which diode or resistor I need?
09 GS500F.
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Offline adidasguy

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Re: LED turn signal diode/ resistor help
« Reply #1 on: April 11, 2012, 10:09:08 AM »
You need 2 and here's the circuit to do it



As you do it, it will look line this: (I used LEDs for the indicators. You can still use your existing incandescent bulbs)


And when re-installed:

« Last Edit: April 11, 2012, 10:11:32 AM by adidasguy »

Offline ARod

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Re: LED turn signal diode/ resistor help
« Reply #2 on: April 11, 2012, 10:56:29 AM »
Thank you! Can't wait to try it out
09 GS500F.
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Offline ARod

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Re: LED turn signal diode/ resistor help
« Reply #3 on: April 11, 2012, 12:23:03 PM »
Ahhhh it worked but now I put it back together the high beam light wont go on and the bike wont start
09 GS500F.
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Offline ARod

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Re: LED turn signal diode/ resistor help
« Reply #4 on: April 11, 2012, 12:24:28 PM »
Did I blow a fuse nothing is working
09 GS500F.
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Offline adidasguy

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Re: LED turn signal diode/ resistor help
« Reply #5 on: April 11, 2012, 12:34:03 PM »
Be sure you didn't cut the black/white wire to the high beam light. You scrape off a little insulation to connect the wire from the turn lamp. If you cut the wire, the high beam indicator won't go on.
You can test it all by having it hanging out before you stuff the lights back in.

By "nothing works" do you mean that no lights or anything come on? Possible the fise. however since all the wiring on an "F" joins under the tank, maybe you pulled out another connector.

There is a polarity to diodes. I used 1N4001's like you bought. Be sure the diodes are the way in my picture. That harness is on my project bike Phenix. It works fine. Power has been connected to the bike and all is OK.

You can check the fuse - its under the rubber cover under the right side plastics to the right of the battery. Your owners manual or a service manual will show exactly where.

Unplug the indicator harness and try things again.

Maybe when you stuffed everything back in you shorted something or pulled out another connector.

Offline ARod

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Re: LED turn signal diode/ resistor help
« Reply #6 on: April 11, 2012, 12:39:34 PM »
When I turn the bike on the oil n N light are very dim, the head light is as well. None signals or tail light work. And the bike won't start. O and the horn doesnt work either
09 GS500F.
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Offline adidasguy

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Re: LED turn signal diode/ resistor help
« Reply #7 on: April 11, 2012, 12:50:08 PM »
Something is shorting out and/or drained your battery. Your fuse is OK.
Disconnect the indicator wiring harness and see what happens.
Check the diodes. Are they in backwards?
If still a problem with the indicator harness removed (unplugged), do you have a volt meter? Check the battery voltage with the bike off. What is it?


Offline ARod

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Re: LED turn signal diode/ resistor help
« Reply #8 on: April 11, 2012, 01:13:21 PM »
The diodes are in right. I did cut the high beam light and reconnected all 3 together. Everything was working perfect before I went to put everything back together. And can't remember if i have a volt meter. Fuse looks good. Wife and kid came home so now I have to wait to try and fix it till tonight. The wait is gonna kill me. Thanks for the help.
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Offline adidasguy

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Re: LED turn signal diode/ resistor help
« Reply #9 on: April 11, 2012, 01:22:59 PM »
Fuse is good. Dim lights mean fuse is still good.
If all was OK until you put everything back, my guess is you pinched some wires in reassembly and shorted things out somewhere causing the battery to drain. That's usually what it means when "everything worked until I put it back together".
I know - been there... done that... opened it back up... saw smashed wire that got squished or poked with a screw. (Not on a bike, but in other electronic projects I've done)

Offline ARod

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Re: LED turn signal diode/ resistor help
« Reply #10 on: April 11, 2012, 04:24:12 PM »
Ok so I hook it back up stock... N nothing. At first it seem to have power but it drained quickly, now nothing.  Left the dash undone... Basically I'm f*****
09 GS500F.
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Offline adidasguy

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Re: LED turn signal diode/ resistor help
« Reply #11 on: April 11, 2012, 04:37:45 PM »
I'm guessing you have a short somewhere. Or you did have a short and how the battery is drained. Charge it back up or jump start from your car (car not running) and run her to recharge the battery. Leave the harness disconnected until you get it charged back up. Then plug it in. If all is OK, then put things back together. Look for shorts somewhere. Did you insulate everything dealing with the diodes?  Maybe your short was there - turn signals shorting to ground. Wouldn't blow the fuse but could drain the battery really fast.

What about the other things you connected? Could you have a short somewhere else?

Could your battery just have decided to die? How old is it? Checked acid levels (if lead acid type)?

Offline ARod

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Re: LED turn signal diode/ resistor help
« Reply #12 on: April 11, 2012, 06:16:16 PM »
Adidasguy Thanks. Jumped the bike, set the dash to stock except I left of the turn signal indicator. Bike is working and the signals are all workng the way it should. Thanks  :cheers:
09 GS500F.
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Offline slipperymongoose

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Re: LED turn signal diode/ resistor help
« Reply #13 on: April 11, 2012, 08:32:11 PM »
I made up my own diode y piece, and got a led specific flasher when I did my indicators. I didn't like the idea of using resistors. Works a treat.
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Offline weedahoe

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Re: LED turn signal diode/ resistor help
« Reply #14 on: November 18, 2012, 09:26:51 PM »
Just want to bump this thread. I did mine tonight and they worked flawlessly.

Before and after pics as well as where I made my connections (soldered and heat shrink)

Picked up a pair of the diodes at Radio Shack for less than $2




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Offline jpaytoncfd

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Re: LED turn signal diode/ resistor help
« Reply #15 on: November 19, 2012, 02:47:10 PM »
I did all my wiring exactly the same way but I did it all under the tank where the connector is. There is more room to work and less chance of crushing or shorting. I will try to get some pics.

Offline adidasguy

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Re: LED turn signal diode/ resistor help
« Reply #16 on: November 19, 2012, 03:26:03 PM »
One thing to remember is diodes have a polarity - they can't go backwards or you could get a short or something else or nothing working at all.

The white band or other obvious marking indicates the plus side (if you can call it that. If I said cathode and anode, everyone would really be confused). When you look at the photo of my assembly, you'll see the correct way to put the diodes.

FYI: Resistors have no polarity. Doesn't make any difference which end goes where.

Offline jpaytoncfd

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Re: LED turn signal diode/ resistor help
« Reply #17 on: November 19, 2012, 03:39:05 PM »
In my mind I picture electricity flowing through wire and objects like water in a hose. so on a diode the white or marked end is where power can come out but cant go in. much like a check valve. Plumber and electrician. amazing how much of it is interchangeable. lol

Offline adidasguy

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Re: LED turn signal diode/ resistor help
« Reply #18 on: November 19, 2012, 03:43:40 PM »
If you really want to be confused, electrons are negatively charged. They really flow from positive to negative!
Odd how we think of electricity flowing from negative to positive.

Other noteworthy factoids:

Typical diodes have a 0.7v drop across them. 12v on one side will be 11.3 on the other.

The field effect transistor was discovered early in the 20th century. Because it switched so little current, and everything of that era needed lots of power, no one saw any use for it and it was ignored until transistor technology and low power devices came into being in the 40's and early 50's thanks to Bell Labs.

Transistors work better and completing a circuit to ground rather than driving current. That's why so many electronic devices seem to be backwards: the device (LED, relay, etc.) is connected to the plus side and the transistor circuit completes a connection to ground rather than connecting to positive voltages as normally done with switches.

« Last Edit: November 19, 2012, 03:56:41 PM by adidasguy »

Offline cristian.ilie

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Re: LED turn signal diode/ resistor help
« Reply #19 on: August 22, 2016, 11:51:22 AM »
Thanks adidasguy for guiding !
2001 GS500E sorted out ;)
Now it signals and indicates properly.

 

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