cannot connect to computer

2004 FORD F-150

200,000 MILES • 5.4L • V8 • 4WD • AUTOMATIC

DALTONRICE

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I turned my truck off at night. In the morning I turned it on and the check engine light was on. A couple weeks ago the check engine light was blinking and was runny rough. So I added sea foam to it and it made it one hundred times better. Also, the obd11 reader or is not reading from the truck. I have tried multiple readers and all say they cannot connect to the truck/computer.

Sep 2, 2018 at 11:19 AM

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STRAILER

AUTOMOTIVE REPAIR CONTRIBUTOR
54,178 POSTS

Hello,

There is a fuse #41 that powers the ALDL connector. Here is a guide to help you check the fuse and the location of the fuse with the wiring diagrams for the connector to help you see how it works:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Here are the wiring and fuse panel diagrams below. Please run this test and get back to us.

Cheers, Ken

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Sep 3, 2018 at 2:25 PM