What does fuse #38 do? It keeps popping like there is a short?

RAYMOND WEST2

MEMBER
2004 FORD EXPLORER
5.0L
V8
4WD
AUTOMATIC
200,009 MILES

What is fuse number 38 for and under in the fuse panel under the hood?

Tuesday, June 23rd, 2020 AT 4:33 PM

5 Replies

BMDOUBLE

MECHANIC
1,139 POSTS

Looks like it is the power supply for several sensors and the PCM power relay. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

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Tuesday, June 23rd, 2020 AT 5:37 PM

UNIBZ454

MEMBER
2 POSTS

What is next -What is the actual procedure to troubleshoot. Fuse #38 keeps blowing did remove the oil pack and ignition transformer capacitor no signs of ground short. Primary coil on coil pack around 1 ohm one of them around.8ohms. Secondary all checkaround 13.3 Kohms. My ford explorer is 4.0L 2004 XLT. I run out of options.

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Sunday, February 12th, 2023 AT 11:25 AM

KEN L

MASTER CERTIFIED MECHANIC
47,204 POSTS

Fuse #38 goes to the heated oxygen sensors which can short out, I would unplug the sensors and replace the fuse to see if it still happens. Here are the sensor locations so you can check it out in the images below. Please let me know what happens.

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Sunday, February 12th, 2023 AT 1:24 PM

UNIBZ454

MEMBER
2 POSTS

My 2004 Ford Explorer is different, see the attachment and you will notice the location for F38 and its path. I had removed the ignition coil the capacitor and F38 keeps blowing trying to upload Xcel or Pdf files and it doesn't work.

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Thursday, February 16th, 2023 AT 4:53 PM

KEN L

MASTER CERTIFIED MECHANIC
47,204 POSTS

They must be an image file. Pnp. Jpeg or. Gif I found a wiring diagram that shows it going to the differential pressure feedback EGR and the EVAP purge canister valve, please unplug these one at a time to see if the fuse blows and let me know.

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