I just learned this with my daughters excursion. Hers was built in Canada and so is my F350 - her head lights where very dim and she ask me to ck them out. While I had it in the shop I discovered that the wires that went to the headlights was 22 gague, even the ground - it had started melting the plugs I installed the new upgrade plugs which was 16 gague wire and I added two more grounds at the headlights. Then I went and looked at my truck and found it had 16 ground 18 high beam and 20 low beam. then I found another Ford pickup built in the USA we where working on and ck it out - supprise all 16 gague wire at the headlights. My daughter called me back about two days later and told me her lights have never been that bright before. If your unit is built in Canada go ck the size of the wire at the headlights. Mike OB