I lost keys to my truck listed above Heritage XL with a 4.6L Triton. I now must replace ECM before programming new.
Aug 19, 2022 at 7:20 AM
Repair Safety Notice:
This information is for general instructional purposes only. Vehicle repair can be dangerous.
Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
and consult a qualified repair shop when needed.
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STRAILER
CAR REPAIR CONTRIBUTOR
54,189 POSTS
Here is what AllData says about the location of the PCM. Check out the images below. Can you upload a picture of the firewall where they say it is?
Image (Click to enlarge)
Aug 19, 2022 at 10:42 AM
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DRIVER1
MEMBER
3 POSTS
This location is for all 2004 f150 models except Heritage...
Aug 19, 2022 at 5:19 PM
STRAILER
CAR REPAIR CONTRIBUTOR
54,189 POSTS
Yep, good call, it is under the dash on the passenger's side near the fuse panel. Below are the diagrams.