Integrated signals need resistors? - MVAgusta.net
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post #1 of 11 (permalink) Old 11-21-2016, 02:24 PM Thread Starter
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Integrated signals need resistors?

Just installed an LED tail light on my 06 F4S with integrated turn signals. The left turn signal flashes very slowly, and the right won't flash at all. The brake light goes out to light the turn signal, so it's getting voltage, but it won't flash. Is this common for LED signals without installing resistors in-line? When I've done this on other bikes, not having resistors made the signals flash faster, not slower/at all.
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post #2 of 11 (permalink) Old 11-21-2016, 03:18 PM
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Quote:
Originally Posted by lgp0722 View Post
The brake light goes out to light the turn signal, so it's getting voltage, but it won't flash
That sounds like the indicator is finding earth though the brake light, something isn't right with the way it's wired up if you're saying what I think you're saying.

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post #3 of 11 (permalink) Old 11-21-2016, 04:01 PM
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...and yes, you need resistors...

10 watt heat sink resistors to make up for the incandescent load you removed.

The flasher unit sees a blown bulb due to the much lower load of LEDs.

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post #4 of 11 (permalink) Old 11-24-2016, 11:31 PM
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The lack of resistor is probably not your problem. A simpler way than adding in resistors is to the replace the standard flasher relay with an LED flasher relay. They work on a flash rate rather than triggered by current.

I put a Narva in. No worries,

http://www.mvagusta.net/forum/showth...+flasher+relay
Snips and Snips like this.

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post #5 of 11 (permalink) Old 11-25-2016, 08:16 AM
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Quote:
Originally Posted by Glenno View Post
The lack of resistor is probably not your problem.
Nice diagnosis...then, if resistance is not the issue, what is?

The described flasher unit that you and Noel espouse electronically corrects for load...i.e. resistance.

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post #6 of 11 (permalink) Old 11-26-2016, 06:44 AM
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Hey mate,

Edit: I realise what I did wrong now. I didn't write that clearly. My fault. I did not mean to suggest that resistors and LED flasher relays perform a different function. Just that if you are going to the trouble of fitting resistors, a simpler and faster correction is to just fit the LED flasher relay.

BUT, In this case I don't think that is the issue.
Happy to be proven wrong, but in my experience when fitting LED lights they blink at a faster rate, not have one not work at all and the other very slowly. If they do cause that I would love one of the sparkys on here to explain it to me

Once again, sorry about my half arsed initial effort.

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Last edited by Glenno; 11-26-2016 at 07:24 AM.
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post #7 of 11 (permalink) Old 11-26-2016, 12:07 PM
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I would also suspect the installation technique...bad ground, poor wiring.

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post #8 of 11 (permalink) Old 12-25-2016, 09:43 AM
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if you replace the relay how will it affect the front signals which are not LED. Also, where do you find a LED relay
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post #9 of 11 (permalink) Old 12-25-2016, 12:36 PM Thread Starter
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The problem ended up being the damn pressure contacts in the mirror stalks. I must have messed with them before I put on the integrated turns and not remembered. Thanks guys!

As for the LED relay, it's just an electronic one, rather than a normal thermal type relay. You can buy them anywhere that sells stuff like that (I know, real helpful...Lol... eBay or radio shack here in the US probably has stuff like that), just make sure the specs and number of prongs match. I looked into a few before I remembered to check the pressure contacts.
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post #10 of 11 (permalink) Old 12-26-2016, 10:14 AM
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Where did you buy the tail light? I just installed one which was purchased from Design Corse and it works flawlessly with no new relay or resistor
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