Do I Need a Custom Fit Wiring Harness for 2003 Ford Windstar Trailer Wiring
Question:
What exactly will happen if I try to splice in a simple 4-wire trailer kit into my 03 Ford windstar as opposed to buying the custom kit?
asked by: Dan K
Expert Reply:
If you try to splice a simple 4-way connector to your 2003 Ford Windstar you will not get proper taillight function and will cause electrical problems with the vehicle if you hook up a trailer. At the very least you will blow fuses and you could cause a problem with the vehicles computerized electronics.
Your Windstar is equipped with a different system for taillights than most other vehicles and needs a Low Side Switching Converter for the taillights to function properly. The converter protects your vehicle from any shorts on the trailer and converts the vehicles three wire system down to a two wire system for the trailer.
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