I am having problems with the charging system on my LTD, and I found a part which I believe may be a part of the charging system, but cannot find any reference to it in the manuals. It is a black box, rubber mounted to the same bracket as the PLR/PBL sensors. It has 3 wires coming out of it, black, green, and red/white, and going to a white plastic connector to the lower left. Anybody know what this part is, and what it does?