LED indicators ..... dont flash ?? ++ FIXED ++

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sthomson1 · #1 Post by **sthomson1** » Fri Nov 28, 2008 9:33 pm

installed x2 rear LED indicators with 8ohm/20 watt resistors inline.

When i switch the indicators on, they just come on and stay on...no flashing ??? any ideas what could cause this ?
The 2 standard front indicaors do the same with the rear LEDs installed .. its as if the bike thinks the 2 rears are blown .. how can i get around this ??

cheers
steve

Gio · #2 Post by **Gio** » Fri Nov 28, 2008 9:40 pm

I think you have to have leds all round or a master relay that deals with front and rear.

Alternatively wait for the experts

D-Rider · #3 Post by **D-Rider** » Fri Nov 28, 2008 9:52 pm

Gio wrote:I think you have to have leds all round or a master relay that deals with front and rear.

Alternatively wait for the experts

No you don't ..... you only need an electronic flasher if you don't use resistors to simulate the load of the bulbs. You certainly don't need LEDs all round/

My guess is that the LED modules have their own in-built current limiting resistors and that you have wired the power resistors in series with the LED modules rather than in parallel with them - as such, there will be F-all current flowing through these resistors and they will not be simulating the normal bulbs.

sthomson1 · #4 Post by **sthomson1** » Fri Nov 28, 2008 10:19 pm

D-Rider wrote:
Gio wrote:I think you have to have leds all round or a master relay that deals with front and rear.

Alternatively wait for the experts
No you don't ..... you only need an electronic flasher if you don't use resistors to simulate the load of the bulbs. You certainly don't need LEDs all round/

My guess is that the LED modules have their own in-built current limiting resistors and that you have wired the power resistors in series with the LED modules rather than in parallel with them - as such, there will be F-all current flowing through these resistors and they will not be simulating the normal bulbs.

Cheers D-Rider, could you explain what you mean by "in parallel". I have the resistors wired to each + wire going to each LED indicator ?????

Aladinsaneuk · #5 Post by **Aladinsaneuk** » Fri Nov 28, 2008 10:44 pm

put your resistor so it bridges + and - - that is in parrallel - what it does is add to the load

sthomson1 · #6 Post by **sthomson1** » Fri Nov 28, 2008 10:52 pm

Aladinsaneuk wrote:put your resistor so it bridges + and - - that is in parrallel - what it does is add to the load

OK, I bridged + and - of the indicator with the resistor, now, its flashing, but, only 3 LEDs are showing out of 18 !!!! take the resistor off, all LEDs come on and stay on !!!

D-Rider · #7 Post by **D-Rider** » Fri Nov 28, 2008 11:15 pm

OK - hopefully this will explain

(I'm assuming you have LED modules with built in current limiting - I think that's normal but have never actually fitted any to my bike .... though I've just bought some to fit....)

D-Rider · #8 Post by **D-Rider** » Fri Nov 28, 2008 11:23 pm

sthomson1 wrote:
Aladinsaneuk wrote:put your resistor so it bridges + and - - that is in parrallel - what it does is add to the load
OK, I bridged + and - of the indicator with the resistor, now, its flashing, but, only 3 LEDs are showing out of 18 !!!! take the resistor off, all LEDs come on and stay on !!!

Not sure how the LED module is wired internally but might just be that the battery is a bit low - try it while running the engine.

sthomson1 · #9 Post by **sthomson1** » Sat Nov 29, 2008 11:48 am

Looks like i was looking for problems when there wasn't any .. that's what I get for reading all the posts about LED's before i started.

Started the bike, hooked up the rear indicators (no resistors) .... work perfectly ... battery must have been low.

These LEDs must have resistors in them to sort out the flash ...

.. and their cheap as chips

for the back - http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... :IT&ih=022
for the front - http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... :IT&ih=005

Thanks D-Rider.

D-Rider wrote:
sthomson1 wrote:
Aladinsaneuk wrote:put your resistor so it bridges + and - - that is in parrallel - what it does is add to the load
OK, I bridged + and - of the indicator with the resistor, now, its flashing, but, only 3 LEDs are showing out of 18 !!!! take the resistor off, all LEDs come on and stay on !!!
Not sure how the LED module is wired internally but might just be that the battery is a bit low - try it while running the engine.

Aladinsaneuk · #10 Post by **Aladinsaneuk** » Sat Nov 29, 2008 12:05 pm

I bought my resistors from maplins - were 14p each.....

D-Rider · #11 Post by **D-Rider** » Sat Nov 29, 2008 12:08 pm

Damn - just bought some the same as the ones you've bought for the front .... for loads more than you paid.
I'm always scouring ebay but didn't think of that for these. Doh!
:smt073

Aladinsaneuk · #12 Post by **Aladinsaneuk** » Sat Nov 29, 2008 12:14 pm

would that be old age causing the short term memory loss??

(mutters about comfortable saddles..... as he cackles away)

sthomson1 · #13 Post by **sthomson1** » Sat Nov 29, 2008 1:11 pm

Aladinsaneuk wrote:would that be old age causing the short term memory loss??

(mutters about comfortable saddles..... as he cackles away)

Got all 4 working.

Just added a resistor to each side at the rear (25w/8ohm) ... sorted

Used black tape to cover the slot on the front fairing .. where the indicator mounts .. dont even notice it (on a black bike)

sthomson1 · #14 Post by **sthomson1** » Sat Nov 29, 2008 1:51 pm

The resistors mounted on the rear indicators get really really hot....think ill buy an LED flasher relay

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LED indicators ..... dont flash ?? ++ FIXED ++

LED indicators ..... dont flash ?? ++ FIXED ++

LED's

done