Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Daylight Running Lights

Late as usual Richard but would these dual colour CANBUS bulbs work for you if you didn’t want to use resistors?

Unless I misunderstand I’m not sure that the L691 base is any shallower than the L794? As far as I can see they are the same. I just transferred my original L794 reflectors and L794 lens (white) into the new L691 dual bases.

Thanks for reply Rog. Yes those LED's do look as though they would do the job. High price and location in USA puts me off though.

Thanks for pointing out but agree I could simply use the twin contact L691 base and add the deeper L794 clear lens with reflector and longer screws which I already have.

I will probably bide my time until something similar to those on your link become available in the UK. May give Duncan at Classic Car LED's a call although he didn't list any CANBUS dual colour when last checked.

The extra feed to white position light I would probably take from the existing unused wing light feed each side.

In an effort to get this thread to drift.

I pondered if it might be possible to convert wingtop lights to function as indicators and whether that would be legal? This would free up the space under the headlights for a set of mini driving lights, mounted where the indicators now sit. Surely someone on the forum has tried this or similar?

One issue Kevin would be finding a suitable LED bulb. It would likely have to be LED as the bulb itself would have to be amber to work with the clear lens of your wing top lamps and match the existing bulb holder. Another issue would be providing an adequate load to the flasher unit which would probably require external load resistors. There are CANBUS/no hyperflash LED's available but most seem to be for the BA15s base bulbs.

Would you be averse to using the dual colour switchback LED's in the existing indicator position? This would allow a constant bright white light fed by sidelight circuit interrupted when indicator selected to flashing amber as discussed above.

Since my last post I have discovered CANBUS friendly switchback LED's here at reasonable price. These have the advantage of flashing amber and off during indicator sequence as a bright amber/white flash is less easily interpreted. They come with BAY15d base (same as stop/tail bulbs) so would require a pair of new bases to accommodate. Again have found these here. Have ordered both and intend to swap lens to the deeper clear L794 type I already have which allows for integral reflector.

Very useful Richard, not quite as simple as I might have imagined. I\ll take a look at your suggestions and probably keep thinking about it, as I do. One of the trigger points was the removal of a faulty front indicator to inspect it, I found it full of water and the bulb mount rusted away all of which was fixed under warranty by B&C at the time. This unit with it'a tubular rubber mount just seems a bit naff to me, the paint is bubbling underneath and I have been thinking about a replacement unit/system etc. and mostly idle thoughts at that.

Using the reflectors makes a big difference Richard

Maybe just worth mentioning…. Should anybody choose to use separate load resistors just be careful how they are mounted. If you can attach them to some substantial metal to dump the heat. They need to dissipate around 20W so whilst not an issue for the normal indicator duty cycle however if the hazards were left on for an extended period they would otherwise get VERY hot.

50W resistor mounted to the inner cowl next to the indicator

Thanks for photo's Roger. My no hyperflash switchback LED's arrived today.



27 SMD for amber and 15 for white. Tested them on a car battery and amber is so bright it temporarily blinded me. White much less though so plan to wire directly to sidelight feed with no relay. Hoping they will just appear as very white sidelights and given their low mounting position won't upset oncoming traffic at nightime much as my LED headlamps in sidelight mode (one watt).

Had a brief look under wings and have identified the two way Econoseal connectors presently feeding indicators each side. I have left over from a previous job enough parts to make up two three way connectors of same brand. If I can extract the pins from existing loom feed and add a third (sidelight feed) I could end up with a very neat configuration. Inserting/removing pins is a fiddly job though so hope this is not overambitious

That’s looking like quite an elegant solution.....
I hope they haven’t gone Dinitrol crazy like they have on my car....

It adds and extra layer of strength and reduces chassis flex

Front sidelamp conversion to accommodate switchback LED's nearly complete. Only tested inside garage finding the white sidelamp mode bright but flashing amber is something else. They work fine without external resistors as promised. After indication sequence the LED's return to constant white within a second assuming sidelamps are on, which they are permanently when running on my Roadster.



Swap over to matching three way connectors easy once I'd completed the fiddly job of removing the pins from OE socket. Third feed taken as expected from redundant winglight bullet connectors once I'd identified which with voltmeter, as all cables covered in black underseal