Led signal problems!!!!! - Kawasaki KLR 650 Forum
1987 to 2007 Wrenching & Mods For maintaining, repair or modifications of Generation 1 KLR's. 2007 and earlier.

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post #1 of 5 Old 09-25-2018, 11:31 AM Thread Starter
Join Date: Oct 2017
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Led signal problems!!!!!

OK I searched and read this and other forums, watched youtube videos for weeks and finally thought I had everything I needed to convert my 2006 KLR to LED signals. I replaced the bulbs with LEDs from superbrightleds.com. I bought the recommended flasher relay from superbrightleds.com and I even picked up LEDs for the indicator lights on the dash. When I installed everything, IT STILL DOESNT WORK!!!!
I switched polarity on the flasher relay, one way the front/rear stays solid on one side, the other way, the front/rear just flashes for a split second but that's it.

With the stock or LED indicator light in the dash, no change.

With no indicator bulb in the dash, no change.

The only thing I haven't done is install the diode kit on the flasher indicator bulb. But I thought if the bulb was removed it should work without it?

WTF am I missing????

Last edited by BiggusDiccus; 09-25-2018 at 11:48 AM.
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post #2 of 5 Old 09-25-2018, 12:08 PM
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Join Date: May 2018
Location: Dothan, AL
Posts: 162
So....its hard to troubleshoot this thing from a written post, but guaranteed you've got a crossed wire somewhere. These lights find their chassis ground through each other, which is generally where the problems start on an LED system. Really the simplest way to do LED's is to add the load resister to each side in parallel. Yes, I understand that defeats the purpose of reducing power consumption, but then the LED's are just a straight one for one swap, splice in the resistor. If power saving is your thing, swap out that massive amperage sinkhole of a headlight for an LED bulb. Just study the wiring schematic for this bike and trace the circuit through. You'll see how potential seeks a ground through the adjacent circuit and what you need to do to make it LED friendly.

1986 Honda TLR 200 Reflex
2002 Ducati Monster 750S < -- For Sale
2005 Kawi KLR 650
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post #3 of 5 Old 09-25-2018, 01:22 PM
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Given the intermittent use (one hopes!) of turn signals, the power savings from LED conversion seems neo-inconsequential, in the overall power budget, to me. But, the brighter, longer-life "bulbs" add some value.

The stock dashboard indicator wiring REVERSES current, left or right turn; an incandescent bulb handles this, but an LED isn't so versatile, sensitive to current flow direction--a couple of diodes will comprise a mini-rectifier and cure the problem. Forgive the redundancy of this remark, if already known!
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post #4 of 5 Old 09-26-2018, 08:07 PM
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Location: Mesa, AZ, USA
Posts: 209
I went with an LED Flasher (like $8 on eBay) in lieu of the Resistors as:
Resistors get real hot,
Resistor needed at EACH corner,
and that's four, count 'em FOUR (4) Resistors to mount as well!
The LED Flasher was a PlugNPlay (though I kept OEM, Justen Kase... they're 'spensive!).

I did the diode, too. When I 'tried it all' at first it weren't right so I thought I messed up the diode. Alas, I had crossed one wire merely when inserting the bullet connectors... EASIEST FIX EVER!
So I learnt that as simple as Turns can be, it's also easier 'n I thought to 'cross a wire' as Shaky6 says above.
My unfortunate 2c is to recommend reviewing each and every Turn connection again, maybe even plugging and unplugging each 'til figured out. I also did well to get a simple Trouble light so I wasn't unpluggin' and pluggin' so much!

Good luck!
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post #5 of 5 Old 09-26-2018, 10:38 PM
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Join Date: May 2018
Location: Dothan, AL
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I dont think you need 4 resistors. You just need one for each side that's "big" enough to mimic both incandescent bulbs. I've only got 2 on each one of my bikes, no issues. They just have to be in parallel after the turn signal switch. On the KLR they're up under the headlight; on the Ducati I stuffed them up under the tail.

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1986 Honda TLR 200 Reflex
2002 Ducati Monster 750S < -- For Sale
2005 Kawi KLR 650
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