Directional lights not working with DCC

[Maltese Mike]

I've just bought a R3740 Class 92 loco. It has come DCC ready. I tested it on an Anologue track and it's performed well and the directional lights worked as they should.

I've now fitted a R8249 hornby decoder, the loco runs ok but the lights no longer work. Any ideas please?

[Rog RJ]

Have you switched the lights on? They don't come on automatically with DCC. Apologies if you already know this.

[Smudge617]

Depending on your controller 0 or 1 will be the On/Off switch for the lights. If they still don't work check the installation of the decoder, if you've installed it the wrong way round the lights won't work.

[Chrissaf]

The Decoder CV29 typically also has to be 128 Speed Step enabled for directional lights to work. CV29 with a value of 6 will be a compatible 128 speed step value OR 2 if you want 128 speed steps with DC Operation disabled.

Some R8249's have been reported to have CV29 with a zero value. Zero in CV29 will typically prevent directional lights working.

[Maltese Mike]

Thanks everybody for your advise. As the lights were working automatically on DC I made the schoolboy error of assuming that they would work automatically on DCC. Rog, no need to apologise, I didn't know I had to switch them on 🤔. Thanks again, you've all given me tips which may help with future projects 👍👍