Some of them have a power lead but the less expensive ones don't. I have
installed the cheaper type on several vans. They always worked but not
always for very long. Depending on how you plan to use the trailer you
might be better off with a set of diodes in a "W" configuration feeding
LED trailer lights. I find that setup to be reliable and bright.

Mark

Project Pat wrote:
> Does the trailer light converter have a "power in" wire?
> Otherwise all the voltage would come from the spliced taillight.
> I wonder if they make a voltage booster or relay kit?
>