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@masala avatar
UTC

Veni, Vidi, Posti
946
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Location: Acworth, GA
 
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@masala avatar
946
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Location: Acworth, GA
UTC quote
Background: I just completed a DIY version of the Euro turn signal mod to my 2007 LX150. Motorsport sells a kit that is plug-n-play for a few bucks, but I wanted to see if I could accomplish the same for less. Additionally, the offering from Motorsport retains the legshield lights as daytime running lights in addition to turn signals, and I did not want that feature - only turn signals, as on European LXs.

Method: I removed the horn cover, mirrors, and headset per standard instructions available here on MV without issue. My plan was to simply run wire from the US-spec "pod" wires (the turn signals) down to the legshield lights and leave the DRL wires out of the picture. As best as I can tell, they are not part of the same circuit. To accomplish this, I had to snip off the plugs (or "connectors") to the pods, and I soldered wire to the newly exposed ends. I ran that wire down the legshield and soldered it to the connector that goes to the legshield lights.

Results: All blinkers work as they should, only there's a new symptom I did not previously have: the rate of blinking of the turn signals (front and rear) is RPM-dependant!

Hopefully, I've just overlooked something simple that a person with more electrical know-how than I would've caught, like needing to add a resistor inline or the like, but I am stumped. Where did I go wrong?

Cliff Notes version: U.S. LXs come from the factory with afterthought turn signal "pods" mounted below the handlebars. The legshield lights are daytime running lights, whereas in the rest of the world, they are the only turn signals. I opened up my bike and simply made the existing blinkers blink further away, where they're supposed to, by running longer wire from the existing leads. The blinkers now are RPM dependent. WTH?
⚠️ Last edited by Masala on UTC; edited 2 times
@jess avatar
UTC

Petty Tyrant
0:7 and counting
Joined: UTC
Posts: 38659
Location: Bay Area, California
 
Petty Tyrant
@jess avatar
0:7 and counting
Joined: UTC
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Location: Bay Area, California
UTC quote
Really? RPM dependent? Are you sure?

That's a new one on me. Color me stumped.
@bluecloud avatar
UTC

Ossessionato
2018 GTS Super
Joined: UTC
Posts: 2316
Location: Googleville
 
Ossessionato
@bluecloud avatar
2018 GTS Super
Joined: UTC
Posts: 2316
Location: Googleville
UTC quote
Have you swapped out the bulbs for yellow bulbs yet?

Did similar mod. Had similar issue.

Difference between mine and yours: 1) cut and spliced the main harness so no additional length added. 2) flash speed not rpm dependent??? but different speed either side.

Fix for mine was factory rear bulbs. Need to file one of the tabs off the bulb to fit the front holder, doesn't affect function or retention.

My thread: Euro conversion signals -- flasher speed?
@miguel avatar
UTC

Veni, Vidi, Posti
2009 GTV250 (Gone), 2003 Inder trailer (also gone), 2001 BMW R1100RT
Joined: UTC
Posts: 5707
Location: Santa Cruz California
 
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@miguel avatar
2009 GTV250 (Gone), 2003 Inder trailer (also gone), 2001 BMW R1100RT
Joined: UTC
Posts: 5707
Location: Santa Cruz California
UTC quote
A guess: If the turn signal flasher is the mechanical type, it's possible that it could flash faster with higher rpms if the voltage regulator is starting to fail because when they do fail the voltage increases which might cause the flasher speed to increase (I'm not positive on that point tho). There are plenty of posts that address failed VR. I think the proper voltage is supposed to be about 14.5 volts at all rpms. If it's higher, it is possible that the VR is bad.

Best
Miguel
@silver_streak avatar
UTC

Veni, Vidi, Posti
2007 Vespa LX 190, 2011 LXV150ie
Joined: UTC
Posts: 8758
Location: Annapolis, MD, USA
 
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@silver_streak avatar
2007 Vespa LX 190, 2011 LXV150ie
Joined: UTC
Posts: 8758
Location: Annapolis, MD, USA
UTC quote
I would definitely check the voltage regulator. Sounds like the upper voltage is not being limited.

Even with the regulator functioning properly there will be some variation of voltage with rpm, but it should be limited to the range of about 12.5-14.5 volts, which I wouldn't think would cause an obvious variation in the flasher rate.
OP
@masala avatar
UTC

Veni, Vidi, Posti
946
Joined: UTC
Posts: 6167
Location: Acworth, GA
 
Veni, Vidi, Posti
@masala avatar
946
Joined: UTC
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Location: Acworth, GA
UTC quote
bluecloud wrote:
Fix for mine was factory rear bulbs. Need to file one of the tabs off the bulb to fit the front holder, doesn't affect function or retention.

My thread: Euro conversion signals -- flasher speed?
As it turns out, this was the solution! Fortunately, my local dealer (San Jose Vespa) had them in-stock, so I was able to go pick up a couple today after work. I came home, ground one of the tabs off each bulb with my Dremel (doesn't matter which tab), and promptly installed the new bulbs. Sure enough, no more wonky blinky!

Thank you to all who responded. While I was hoping for a simple bulb fix, I was preparing myself mentally (and financially) for it to be the voltage regulator.

As the Dyson guy says on the commercials, "I just think things should work properly."

OP
@masala avatar
UTC

Veni, Vidi, Posti
946
Joined: UTC
Posts: 6167
Location: Acworth, GA
 
Veni, Vidi, Posti
@masala avatar
946
Joined: UTC
Posts: 6167
Location: Acworth, GA
UTC quote
Final note: The icing on the cake was that the entire project was done for the grand sum of $11. It would've been less had I not had to purchase new solder from the hardware store. Additionally, the 2 bulbs from SJV were around $7, so I'm willing to bet it could be done for under $5 if those could be sourced for $.50 or $1 each. Not bad for an hour's work or so, minus the trip to the hardware store!

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