A nice quality headlight harness
No connection with this product other than being a pleased and satisfied customer:
For those that want an aftermarket upgrade headlight wiring harness, please check out Susquehanna Motorsports(rallylights.com). I used one of their harnesses for 10 years in my old 91 truck, and am now acquiring one for my new 97 4R.
They are, in my opinion, made correctly. You will not be disappointed in the quality of the construction: Heavy duty, 12G wire throughout.
The part number for my '97 4R is HL28200S(switched ground, H4 headlights). Cost is on the high side, about $123 this time--they were cheaper ten years ago!