My 250 XLR side light works from the battery when the ignition is switched on, no problem, the headlights only work when the engine is running, presumably direct from the generator through the reg/rec, the battery is charging at 13.8 so the reg/rec seems to be ok but I keep blowing headlight bulbs, I have tried to get a voltage reading from the bulb holder with the engine running without any luck, when I put a new bulb in it gets very bright when revd as if its not being regulated. Any sensible ideas as I don't want to swap it for WATSITS.