When I got this 31 A several months ago the low beam on both headlights was out both bulbs were bad. The fellow I got it from gave me two new bulbs(thought they were new) but one filament was burned out in each. Anyway I ordered two Narva H4 6V 60/55w. I put the new ones in and they worked. Now when you turn lights on first position is low and next one is high correct? Turning the lights on shining on wall looka like first position is brighter than the second position like the wired could be crossed. I had the engine running in the shop and switched between low and high several times and they were working then I did it again and both lights went out. First position nothing second lights come on. I could be wrong on this but if they are wired backwards I would not think that would blow one filament cause there is only 5 watt difference between low and high. I am going to try and find me some cheap 6v bulbs to put in there till I figured this out. Anybody come across this yet?