The
wiring that is internal to the vane is one thing and the wiring that connects it to your
batteries is a different thing. The first could be best troubleshot by someone knowlegable with that particular vane (best) or by another
windvane person. You might get good
advice on that from someone who is familiar with alternators.
If the problem is with the wiring to the
battery system you only need someone who is qualified (often someone who has a
boat around you), or better by a general
marine electrician. You should check your fuse first, then all connections ( positive and negative). This is often the source of "wiring" problems. You need to be more specific though. Co you have a separate charge
regulator for the vane (like those for solar)? I would think so. It could also be the problem but it sounds like you need someone to do basic trouble shooting first which can be done by many cruisers who know how to do this with only a multimeter.