Ducati Monster Forum

Moto Board => Tech => Topic started by: Valor on July 18, 2009, 04:05:43 PM

Title: LED Signals, fast blinking ... How big of an issue?
Post by: Valor on July 18, 2009, 04:05:43 PM
I've ready the past posts on this, but still cannot tell if this is a potential problem, or just a preference/inconvenience.

I purchased cheap (well $50 pair) LED Turn signals. Front and Back. They all blink correctly, just faster. I totally get what is happening. I understand a resister can slow it. But do I have to? Will it hurt anything? I kind of like the fast blinking, seems more noticeable.

I just stuck $800 into a new dash because of an electrical issue, so I'm not looking for another.

Opinions?


Title: Re: LED Signals, fast blinking ... How big of an issue?
Post by: Triple J on July 18, 2009, 04:14:42 PM
I don't thinkt it hurts anything.

A couple of resistors from Radio Shack will only cost you a few bucks though if it starts to bug you (it did me).
Title: Re: LED Signals, fast blinking ... How big of an issue?
Post by: He Man on July 18, 2009, 04:45:53 PM
been runing mine like that for a very long time (8,000+ miles) shouldnt have any big issues.

$800 for gauges is alot. i would of just ditched them.
Title: Re: LED Signals, fast blinking ... How big of an issue?
Post by: filter on July 18, 2009, 08:42:26 PM
You can buy a replacement electronic flasher unit for LED lights (Monsterparts.com sells them) that plugs into the existing wiring.  It will flash normally then.

You can get a new flasher unit for under $20.
Title: Re: LED Signals, fast blinking ... How big of an issue?
Post by: IdZer0 on July 19, 2009, 12:44:07 AM
I think the flasher unit is only for older monsters. The newer ones don't use a separate unit.

Also I've heard that it _might_ fry your dash, but apparently others use it without any consequence. There's another thread about a guy that has ruined his dash with aftermarket bulbs (!not LEDs) according to his dealer. I personally wouldn't risk it.

It's doubtful any  [leo] would say anything about it but I guess it's also not conform the regulations.
Title: Re: LED Signals, fast blinking ... How big of an issue?
Post by: Grug on July 19, 2009, 07:33:22 PM
Also depends on the rules where you live. Down here in Aus indicators are only allowed to flash so fast, so if a cop pulled you over for it they'd slap an un-roadworthy sticker on it, and you'd have to get a trailer to collect the bike and take it back home from the side of the road where you'd been pulled over.

I haven't heard of it happening much, but it's still something to consider.
Title: Re: LED Signals, fast blinking ... How big of an issue?
Post by: corey on July 20, 2009, 10:10:11 AM
Quote from: IdZer0 on July 19, 2009, 12:44:07 AM
I think the flasher unit is only for older monsters. The newer ones don't use a separate unit.

Also I've heard that it _might_ fry your dash, but apparently others use it without any consequence. There's another thread about a guy that has ruined his dash with aftermarket bulbs (!not LEDs) according to his dealer. I personally wouldn't risk it.

Correct.
The newer monsters have an electronic flasher unit built into the gauge cluster, rather than a thermal flasher that is a separate unit. I would imagine that the excess heat from the flasher unit running twice it's normal speed could cause a problem... But i'm only speculating. As stated, resistors are cheap insurance to avoiding problems.

Not to mention that the "hyper-blink" looks kinda squidly... ;D
Title: Re: LED Signals, fast blinking ... How big of an issue?
Post by: Valor on July 20, 2009, 06:00:43 PM
Thanks for all the insight guys. I'm going the resistor route later this week. So, just to clarify, if I have 4 signals, front and back, I need a resistor on each one of them, right??

Valor
Title: Re: LED Signals, fast blinking ... How big of an issue?
Post by: ephophex on July 20, 2009, 06:29:23 PM
Yup, you'll need one for each LED, wired in parallel.  In my case, I fit 3W LEDs to an '00 M750.  For help with the calculations, I found this site to be handy:

http://www.moto.dotklein.com/index.php?33654b537466eb692338ca23 (http://www.moto.dotklein.com/index.php?33654b537466eb692338ca23)

Click the "Hyper LEDs" link, and see the "Calculation and circuit plan" doc.  Substitute in your LED wattage, and it'll lead you straight to the required resistance.

One suggestion I would make that deviates from their plan:  use 25W resistors instead of 10W.  I tried both, and the 25W run cooler.  They're not *that* much larger, and the additional heat-sink capability is nice should you mistakenly suffer from granny blinker and leave them on for a few miles.
Title: Re: LED Signals, fast blinking ... How big of an issue?
Post by: NAKID on July 20, 2009, 06:32:17 PM
I think the fast blink leads to increased visibility, but that's just me...