guzziriders.org - moto guzzi forum Homepage
Forum Home Forum Home > Technical > General Electrical issues
  New Posts New Posts RSS Feed - 1200 Sport V4 tail light LEDs
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

1200 Sport V4 tail light LEDs

 Post Reply Post Reply
Author
Message
MotoKatie View Drop Down
Falcone
Falcone
Avatar

Joined: 18 Dec 2021
Location: UK
Status: Offline
Points: 22
Post Options Post Options   Thanks (0) Thanks(0)   Quote MotoKatie Quote  Post ReplyReply Direct Link To This Post Topic: 1200 Sport V4 tail light LEDs
    Posted: 02 Jan 2022 at 23:09
Hi
Still not found the thread to replace some of the LEDs on the 1200 sport or any other LED tail light. Can anyone help as Im sure it will have been done before xx
Katie xx
MotoKatie
Back to Top
Brian UK View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13 May 2014
Location: Surrey
Status: Offline
Points: 17641
Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jan 2022 at 08:22
I can't either.
I do know they are surface mounted diodes, but not which one exactly. They must have a voltage regulator too as both tail and stop are the same LEDs, running at different voltages.
All I can suggest it to find the working voltage of one LED when the stop light is on and see if you can find a red SMD with that forward working voltage.
Sorry not to be more helpful.
Brian.

Better 5 minutes late in this world than years early in the next.
Back to Top
Simond View Drop Down
Senior Member
Senior Member
Avatar

Joined: 23 May 2021
Location: Kent
Status: Offline
Points: 886
Post Options Post Options   Thanks (0) Thanks(0)   Quote Simond Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jan 2022 at 10:18
Hypothesis;

If it’s the same LED at two brightness levels, it’s more likely to be the PWM duty cycle that changes, say 100% for brake lights and 25% for tail.  I doubt they’d change the voltage.

Not sure that helps find the right LED but might make selection easier.

Given some more info (eg package size) it might be possible to get down to a very few candidates by using the filters here. 





Back to Top
Brian UK View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13 May 2014
Location: Surrey
Status: Offline
Points: 17641
Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jan 2022 at 12:31
What I do know is that when the tail light alone is on, you get a few volts "feedback" on the brake light circuit.
Brian.

Better 5 minutes late in this world than years early in the next.
Back to Top
lawny View Drop Down
Falcone
Falcone
Avatar

Joined: 23 Dec 2014
Location: United Kingdom
Status: Offline
Points: 52
Post Options Post Options   Thanks (0) Thanks(0)   Quote lawny Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jan 2022 at 18:08
This probably isn't much help but some years ago the LEDs on my Norge tail light began to fail in sequence. 

The advice from Twiggers was to swop out the entire unit rather than try to replace individual LEDs.  I understood the reason to be that, while the LEDs might be cheap, balancing the whole thing so it worked was too difficult and chances were it would just keep on killing them in a row.



Back to Top
MotoKatie View Drop Down
Falcone
Falcone
Avatar

Joined: 18 Dec 2021
Location: UK
Status: Offline
Points: 22
Post Options Post Options   Thanks (0) Thanks(0)   Quote MotoKatie Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jan 2022 at 12:52
Interesting discussion, Ill take off and split my rear light when its a bit warmer... Should easily be able to tell if its the LED failure or circuit corrosion/tracking issue. 

MotoKatie
Back to Top
Brian UK View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13 May 2014
Location: Surrey
Status: Offline
Points: 17641
Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 04 Feb 2022 at 22:21
I see you have made some progress, looking at the conversation on Guzzitech.

It's looking like the LED is something like this.


Edited by Brian UK - 04 Feb 2022 at 22:26
Brian.

Better 5 minutes late in this world than years early in the next.
Back to Top
Ken-Guzzibear View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13 May 2014
Location: Sileby Leics
Status: Offline
Points: 9454
Post Options Post Options   Thanks (0) Thanks(0)   Quote Ken-Guzzibear Quote  Post ReplyReply Direct Link To This Post Posted: 04 Feb 2022 at 22:34
I see now so many vehicles with a single led in a row of them failed. As one goes it will prompt others to die and then a WHOLE new unit.

Even vehicles with old school bulbs have been made more difficult to replace. Take Sprinter Vans the previous rear lights were fitted as a unit with 2 spring type clips took under 30 secs to open and swap a bulb clip the unit back in easy cheap fix. 

Newer ones are the WHOLE lens unit that requires Torx head screws undoing and the driver head needs to be magnetised or the black torx head screws hit the deck and are impossible to see. Once they are undone a 2nd person has to hold the rear door half open and the whole unit has to be hand slapped sideways, try and pull it backwards it breaks the pins and new unit needed. 

Once the unit is free THEN you can unclip the bulb "rack" and replace the bulb, then the whole unit needs pushing back from the side, whilst someone holds the door THEN you can refit the torx head screws. 

So 2 guys and 10 mins at least to replace a bulb .... kerrrr ching for the dealerships. These are relatively easy too compared to some vehicles. Maybe this is why soooo many have bulbs out on the roads.
The Older i Get, The Better I Was
Back to Top
Brian UK View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13 May 2014
Location: Surrey
Status: Offline
Points: 17641
Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 07 Feb 2022 at 17:42
Well just in case anyone else has this problem, it appears the replacement LED is this.
Brian.

Better 5 minutes late in this world than years early in the next.
Back to Top
c13pep View Drop Down
Senior Member
Senior Member
Avatar

Joined: 31 Aug 2017
Location: Doncaster
Status: Offline
Points: 2110
Post Options Post Options   Thanks (0) Thanks(0)   Quote c13pep Quote  Post ReplyReply Direct Link To This Post Posted: 07 Feb 2022 at 18:54
There are supposedly several newer cars that need the front bumper removed just to replace a headlight bulb, so maybe ten minutes doesn`t sound so bad

CHRIS 
you can`t have any fun in a straight line

Monza
Honda CB77 project

Back to Top
Brian UK View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13 May 2014
Location: Surrey
Status: Offline
Points: 17641
Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 07 Feb 2022 at 22:05
But we are talking about replacing individual LEDs within the light unit.
Brian.

Better 5 minutes late in this world than years early in the next.
Back to Top
Mike H View Drop Down
Senior Member
Senior Member
Avatar

Joined: 21 May 2014
Location: East Anglia
Status: Offline
Points: 8733
Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike H Quote  Post ReplyReply Direct Link To This Post Posted: 09 Feb 2022 at 19:38
Soldering iron with a very small tip, and a big magnifying glass Big smile

And steady hands.



"Chicken nuggets don't dance on a Tuesday."
Back to Top
TooJuicy View Drop Down
Senior Member
Senior Member
Avatar

Joined: 06 May 2015
Location: Guildford, Surr
Status: Offline
Points: 759
Post Options Post Options   Thanks (0) Thanks(0)   Quote TooJuicy Quote  Post ReplyReply Direct Link To This Post Posted: 24 May 2022 at 16:45
Originally posted by c13pep c13pep wrote:

There are supposedly several newer cars that need the front bumper removed just to replace a headlight bulb, so maybe ten minutes doesn`t sound so bad

CHRIS 

Nothing new under the sun is there?    Years ago I had a 1974 Rover 2200 (P6).  The headlights were sealed beam units.  The front steel bumper masked the lamp unit mounting screws.  Maybe a sign of the times (1974) rather than of Rover designs. 

Tony  
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.03
Copyright ©2001-2019 Web Wiz Ltd.

This page was generated in 0.078 seconds.