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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
New flasher unit
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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
Current flasher unit
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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.