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Help with fitting LED indicator bulbs
Posted: Sat Nov 14, 2026 8:54 pm
by KevinB
I bought some LED bulbs, but as we know, they don't work with the original flasher unit. They don't flash.
So I have got this new flasher which is supposed to work with LEDs.

- New flasher unit
- PXL_20261114_144829179~2.jpg (1.02 MiB) Viewed 104 times

- PXL_20261114_144935727~2.jpg (1001.55 KiB) Viewed 104 times
Can you please help with how to connect this in? The B, E and L.
I have also asked the seller.
Per the old wiring diagram, I have currently a green power wire, a green/brown to the indicator bulbs and a light green to the switch warning light.
Here's my current flasher unit.

- Current flasher unit
- PXL_20261114_145624342~2.jpg (831.39 KiB) Viewed 104 times
PS Thanks to who brought back the message board tonight.
PPS I have my Morris back after the welding and brake work, with a fresh MOT.
Re: Help with fitting LED indicator bulbs
Posted: Sat Nov 14, 2026 9:45 pm
by jaekl
Initial thoughts would be B is positive power input and E is negative earth for the flasher itself. Then L is for the lights. I'd suspect that the switch indicator light will need two inputs with diodes on each. The supplier should confirm.
Re: Help with fitting LED indicator bulbs
Posted: Sat Nov 14, 2026 10:20 pm
by svenedin
I'm not particularly inspired by the Chingrish on your flasher unit......
IF it follows normal convention then
B is battery so that is the plain dark green wire
L is lamps so that is the green with brown trace wire
E is presumably earth so there is no connection for the pilot lamp on the indicator stalk (light green wire)
Conclusion: the unit is not suitable as for the MoT test there must be a tell-tale lamp for the indicators. It is also only suitable for negative earth it appears.
Get one of these which I can personally vouch for. They work perfectly. Note: must be connected to earth which you can do to the mounting bolt. The bracket will need the hole enlarged with a rat's tail file. Purchase the correct polarity unit as they are not interchangeable.
https://www.classiccarleds.co.uk/produc ... -p-2-3-pin
Stephen
Re: Help with fitting LED indicator bulbs
Posted: Sat Nov 14, 2026 10:39 pm
by KevinB
Thank you jaekl and Stephen.
I was not encouraged by the language on it either! I shall have a play with it and try to understand. Hopefully without doing any damage to the car. And then almost certainly follow your advice Stephen.