I am constructing a resistive heater that I plan to operate using a standard car battery. Resistance has been measured at about 1 kilohm, but whenever I hook up the battery, the wire begins to smoke at the source, but the element does not actually see any temperature rise. With resistive heating is there supposed to be a gradient in temperature between the source and drain? Are my voltage or current to high? Does anyone have any experience with this type of issue? Thanks in advance.