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.
Image (Click to make bigger)
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
-1
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.
Was this
answer
helpful?
Yes
No
-1
Sunday, February 12th, 2023 AT 11:25 AM
KEN L
MASTER CERTIFIED MECHANIC
48,380 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.
Image (Click to make bigger)
Was this
answer
helpful?
Yes
No
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.
Was this
answer
helpful?
Yes
No
Thursday, February 16th, 2023 AT 4:53 PM
KEN L
MASTER CERTIFIED MECHANIC
48,380 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.