Had to change engine wire harness due to squirrel problems. Can't figure out where some plugs connect. Also one connector has different color wires on each end if I un plug it puts it in limp mode if I connect it i get an engine light in dash. Any help will be greatly appreciated



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What year & what model F150 do you have?

 

2008 5.4l 4x4 xlt 145" wb

 

I should also add that the harnesses were exact number matched

 

It would help if you had a picture of the entire engine so that we can see where these connectors are located under the hood.

 

The plugs in question are all along the firewall. The 2 prong plugs are exactly alike on opposite sides , the red 4 prong female plug is in about a 6" pigtail from main harness on the right(passenger) side.

 

The four pin connector may be for the fuel rail pressure sensor, If you give me the wire colors I can confirm. Is it possibly the throttle position monitor connector?

 

Here is a pic of the wires

 

The throttle position sensor is already plugged in, this plug is not long enough to get to the tps

 

My manual is for a 2007 and I do not (so far) see a match. I looked under the hood on my 2007 4.6L and did not see a connector like the one in the photo.

Lets confirm wire colors
Red with yellow stripe
Gray with White stripe
Light Blue with Orange stripe
Black with white stripe
I will continue to see if I can find a match. Maybe the connector was changed in 2008 vs my 2007. Looks line slots instead of pins.