Bong, Well, its actually the turn signal 'chime' that goes off intermittently. Happened yesterday after an hour or two driving with the headlights on. No 'you left your lights on' chime when ign off, not on my coach. I don't think its a smartwheel thing, our coach has a smartwheel but I don't think that connects to the turn signal chime. Also, the low hyd fluid I think uses the 'warning' bong like comes on with low brake air pressure. Different sound. My issue is with the turn signal circuit, somehow. Turn signal chime is turned on by the headlight circuit after an indeterminate period. Hmmm