Question about 2006 Ford F-150

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My 4 wheel drive wouldn't come on. No 4h or 4L light either. I checked the fuse and found that the 30amp fuse was blow. as i proceeded to install a new one, it blew as well. and then another. I put the truck up on a lift and disconnect the harness to the transfer case motor in case there was a problem there and then installed another fuse and it blew as well. i have a 2006 f-150 fx4 5.4L. what could be the possible problem? oh yeah, my wife drove the truck on the highway doing around 65 with the truck in 4h, she said she wasn't paying attention. it hasn't worked since.

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If you have a 30amp fuse then you have a electronic 4X4 system, the 30 amp fuse powers the 2 4X4 relays in the auxiliary relay box under the hood the wire from the fuse is a green wire, pull both relays and replace the fuse if the fuse still blows then there must be a short between the fuse box and the relay box, if the fuse does not blow then install the relays one at a time when you install one of them the fuse should blow but then you will know witch one has the short, if it is the clockwise relay then the short is in the red wire from the relay box to the motor on the transfer case if it blows with the counterclockwise relay then it is the orange wire from the relay box to the transfer case motor if the wire test less then 5 omes residence then replace the shift motor on the transfer case.

let me know if there is any thing else i can do for you.

Posted on Mar 13, 2011

  • john nail
    john nail Mar 13, 2011

    your welcome....thanks for using fixya

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If fuses related to the 4 wheel drive is not pop close the panel(s) up.

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