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How do I install LED turn signals/brake light/etc on my 1980 GS750

  • Thread starter Thread starter thkbaron
  • Start date Start date
yeah I'm redoing the seat on my bike and taking off the rear fender so I don't have any place for my big ass light to sit anymore so that's the reason I'm messing around in the first place. Honestly if there was a good way I could just use standard bulbs and accomplish what I want to I would. I'm not an led snob by any means.
 
Well, that makes sense . Just be aware, unless you're upgrading gauges too, you will want some little leds to tuck into them as indicators...or a "diode scheme" to use the original incandescent bulbs, but the little leds are far simpler.
 
So I can expect my turn signal indicator to not work when I install the led signals? That's what yer saying?
 
yeah I've never dug into the electrical system in this bike. I know a CX500 inside and out but not this one. I was never really going to build this one. haha. my plans are to get a new bike eventually. I've been working on that for 8 years. haha. Kids get in the way. When I do it'll be an Indian scout bobber. At least as of now that's what I want.
 
LAB3 said:
Hmmmm, guess that makes another good case for resistors....
Click to expand...
not really. Diodes are better and, even better, you can nowadays get tiny leds with the same sockets (is it T10? I'd have to check-it's been awhile since i fiddled...) that run straight from 12volts (ebay) and . I have the whole dash lit with them on a couple of bikes. They are really cheap because some of them don't agree with the 'CanBus" of modern car computers so they're dumping them.
 
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Well once I get it all swapped over and I have annoying problems. I'll consult you guys. My crap should be her this week.
 
ok so I have a problem. I installed the new flasher relay and I've got them to flash just fine except when I turn the left on the both flash and when I turn the right on the both flash. From the problems I had before when I did the cx500 wiring this happened and I ran into a back feed problemI believe through the idiot light. I put a diode in there and that fixed the problem. I'm guessing it has something to do with the way the internals on the LED turn signals are wired. I tossed diodes in right before I hooked the signal up and that oddly didn't seem to work. reverse the diode and no light at all and flip it the other way and the same issue. What am I missing here folks?
 
Steve has a diagram describing a two diode solution. I have never dealt with it so do not remember the details.

That said, you want either directional side to power the LED indicator but not feed the other side.

So you would wire from either directional side through a blocking diode (banded cathode toward the indicator light). This way current can not go from one side to the other, but rather only through to the indicator.
 
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could I just have to toss a diode on the flasher relay itself with this new one? Oh and are the front lights running lights too? I can't remember now!
 
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thkbaron said:
could I just have to toss a diode on the flasher relay itself with this new one? Oh and are the front lights running lights too? I can't remember now!
Click to expand...

You can design it anyway you like. However, if you want it to work follow what i describe.
 
I understand how a diode works but when I install them they both still blink when either the right or left is switched on. Just wondering where I'm going wrong or if it has something to do with the turn signals themselves. In comparability etc.
 
ok. I'm dumb. someone earlier I think already explained this to me. I forgot I have an idiot light for turn signals that's no longer working since I installed the signals. but that's my back feed problem I'm sure since I only have one light!
 
At least I’m assuming this is the problem someone else can correct me if I am mistaken
 
turnindicatordiode_schematicforLed.jpgThis is for a Honda with a SINGLE dash indicator. For SUZUKI, the wire colours converted are are:
Honda lb,O =Suzuki lg(light green), B (black)
Honda G=Suzuki B/W(black/white stripe=ground)

so...you need ADD a wire to tap into a handy B/W wire nearby.

If you want to dispense with the incandescent, you can replace the diodes with tiny 12v leds,tuck them in the same hole in the gauge OR mod the dash and have INDEPENDENT 12v leds for left and right indicators.

Your led turn signals will NOT function independently with the original dash indicator's wiring. The bulb in the dash with the original wiring CONNECTS all turn signals together. They work with this bulb in place because your new leds draw very little power and the incandescent bulb is seen as a small resistor to them-nothing more.
 
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