1990 Wiring harness question

[2 bronco 11s]

If I use a 1990 4.0 engine harness and ecm do I still need to change the harness for the headlights etc ? The 4.0 harness is a 1990 Ranger . The vehicle it’s going in is a 90 Bronco 11 2.9 . Thank You

 

[RonD]

No, but you may need to separate some of the wires in the harness's to remove all the 2.9l engine wires

The lighting, wipers and other body electrics are separate systems with no connection to computer or engine wiring

 

[2 bronco 11s]

Thanks . I have both harnesses now . I had already removed the 2.9 completely . Got the other and I believe the only thing that each harness has in common is the main ground plug . Fun’s gonna start soon .

 

[RonD]

I am sure you already know this but the Tech section here: https://www.therangerstation.com/tech/

Has a few wiring guides for the 2.9l to 4.0l conversion for BII's in the Engine section