Ducati Monster Forum

Moto Board => Tech => Topic started by: memper on May 13, 2012, 10:21:12 AM

Title: Odd electrical..old work, new dont
Post by: memper on May 13, 2012, 10:21:12 AM
Decided to hook up the new front led signals to match the new rear led's. PO had the front signals in a box, still wrapped in bubble wrap.
At this time all lights worked and I disconnected the stock front bulbs at the bullet connectors, then hooked up the new led's in their place. No blinkers at all. No action at the front and about two of the little bulbs in each rear were at a dull constant glow. Cannot hear rhe tick of the flasher relay.
So I disconnect the fronts and put the stock bulbs back on and all four flasher work fine, relay ticks normally. (Ps- no resistors are installed yet)
What's going on here?
Title: Re: Odd electrical..old work, new dont
Post by: ducpainter on May 13, 2012, 11:53:11 AM
What bike?

If it's an older model you can try a heavy duty (Ind# 552) flasher.
Title: Re: Odd electrical..old work, new dont
Post by: sofadriver on May 13, 2012, 12:18:42 PM
Quote from: memper on May 13, 2012, 10:21:12 AM
(Ps- no resistors are installed yet)


install resistors
Title: Re: Odd electrical..old work, new dont
Post by: memper on May 13, 2012, 01:15:09 PM
Its a 99 750 dark. So just resistors will solve this? I thought the signals should at least work but flash too fast, which resistors would solve by reducing the current to the less power hungry led's.
So is it a new relay or a set of resistors that i need? I suppose trial and error will  clear it up. I will attempt the resistors first.
Title: Re: Odd electrical..old work, new dont
Post by: Duck-Stew on May 13, 2012, 07:04:26 PM
Resistors add load to the circuitry to cause the factory thermal flasher to cycle.

Best option (IMO) is to swap out the thermal flasher unit for an electronic one.  The electronic ones don't use the circuit load to cycle, they just do it no matter the load.  It's a simpler install and I've seen resistors melt plastic used to mount them...
Title: Re: Odd electrical..old work, new dont
Post by: memper on May 13, 2012, 07:28:34 PM
Ok cool. I was just reading up on general resistor info and they can be prone to melting which means getting back into the wires again to replace. I'll just go the suggested route of a new flasher. So any Autozone 552 dual prong would be fine?
Title: Re: Odd electrical..old work, new dont
Post by: ducpainter on May 14, 2012, 02:38:06 AM
Quote from: memper on May 13, 2012, 07:28:34 PM
Ok cool. I was just reading up on general resistor info and they can be prone to melting which means getting back into the wires again to replace. I'll just go the suggested route of a new flasher. So any Autozone 552 dual prong would be fine?
According to Stu I'm wrong.

You don't have enough load to cycle a 552.

Get the electronic one.
Title: Re: Odd electrical..old work, new dont
Post by: memper on May 14, 2012, 04:46:33 AM
Got it. Thanks a bunch
Title: Re: Odd electrical..old work, new dont
Post by: Duck-Stew on May 14, 2012, 06:38:51 AM
Quote from: memper on May 13, 2012, 07:28:34 PM
Ok cool. I was just reading up on general resistor info and they can be prone to melting which means getting back into the wires again to replace. I'll just go the suggested route of a new flasher. So any Autozone 552 dual prong would be fine?

Take your existing flasher to AutoZone and buy the electronic replacement unit that matches the stock unit.  (it may be a little taller)  Plug it in and go.   
Title: Re: Odd electrical..old work, new dont
Post by: MotoPsycho on May 14, 2012, 11:38:17 AM
http://www.superbrightleds.com/cgi-bin/store/index.cgi?action=DispPage&Page2Disp=%2Fflashers.htm (http://www.superbrightleds.com/cgi-bin/store/index.cgi?action=DispPage&Page2Disp=%2Fflashers.htm)

4th one down.
Title: Re: Odd electrical..old work, new dont
Post by: memper on May 14, 2012, 12:09:30 PM
Word...