Just hoping someone else has done the homework. Looking for one of the electronic modules that sends 4W to the front & rear turn signals to make them act as running lights. When the turn signals are activated, 27W goes to the bulb via the flasher relay instead. Some have brake light mods built in. Just wondering what products everyone has had success with on a 1981 XJ650H

Tough question. Try subscribing to the mailing list and ask there. Lots of techies in there who've done a tonne of eletricial work.