Lane B warning light

Looks like fuse F15 in the Rotax fuse box supplies the Lane B light.

See section 76-10-00 of the Heavy Maintenance Manual, page 39.

Thanks I'll look it up

I have now changed both Lane warning lights; Both work, however, I now get:

Lane A switched ON, BOTH LIGHTS COME ON, LANE A goes out after 8 secs. LANE B stays on. LANE B switch ON, LANE B goes out after 8 secs.

Switch off LANE A, Both lights come ON, Lane A briefly but LANE B remains on until LANE B is switched OFF.

THus anytime ONE LANE is Switched on BOTH LIGHTS are on, then the switched light goes off.

I can't find any verification for this in the manuals?