so the harness I bought here in order to power a light and a battery monitor does not work. http://www.ebay.com/itm/350865043780?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 the battery monitor works if i hook it directly to the battery, but if does not work when i try and connect it to the the Y harness. the light works thru the Y harness though. After carefully studying everything for a few minutes it appears that the Y harness takes 4 wires off of the balance charger and splits them into 2 and 2. So i guess the headlight only requires 2 wires but the battery monitor requires 4 and that is why it is not working. Maybe I should have read the description on ebay better, now I understand why it says you can power 2 lights with the Y harness. oh well you live you learn. now the real question is, is there a Y adapter out there that will let me power a headlight AND battery monitor? or is this just something people rig up on there own?