Welcome. Your codes are for all four of the O2 sensors. There is a very good chance it is the wiring harness as you mentioned. Do send it in to Ford to check the wiring harness. 10 years/100k miles extended customer satisfaction warranty.
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
Your codes are for all four of the O2 sensors. There is a very good chance it is the wiring harness as you mentioned. Do send it in to Ford to check the wiring harness. 10 years/100k miles extended customer satisfaction warranty. 
