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ford F350 4x4 issues

Discussion in 'Truck & Equipment Repair' started by james.j.smith, Jan 6, 2014.

  1. james.j.smith

    james.j.smith Senior Member
    from 19033
    Messages: 145

    I have a 2003 F250 6.0L powerstroke with a snoway series 25 8’ plow. I’m having some issues with my 4X4 in the truck. A couple weeks ago my 4x4 quite working and I have no indication on the dash. I put it into the ford dealer and the 4x4 module was replaced. I’m told that this is the computer module that controls the 4X4. Once this was replaced I was getting the indication again. This past storm I plowed with 4X4 for 13 hours with no issue. Once I got home the truck sat for several hours and when I ran out later that evening I had no indication on the dash for 4X4. The next day I unplugged the connectors to the module and I got an indication again and had 4X4 for that whole day the truck then sat for a day. Today I disconnected the plow and again have no indication. I tried unplugging the connectors to the module and this time I had no luck in regain my 4X4. The module that I’m referring to is behind the glove box. Does anyone know the correct term for this module?

    What I plan to do is redo the grounds on my plow wiring they are all connected to the battery and I was going to ground them to the chassis. The wiring schematic for the plow does indicate that the grounds are supposed to be on the battery but I figured it wouldn’t hurt anything and could possibly be better if they’re are grounded to the truck frame. Once I do this I am going to drop it off to ford. I have no warranty on this truck and was wondering if anyone had any insight before I went to the dealer?
     
  2. johnhenry1933

    johnhenry1933 Senior Member
    Messages: 256

    Is the 4x4 engaging, or not? Checking for proper grounds is a good first step. Did you consider that it may simply be the indicator light, or its' wiring?
     
  3. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,972

    If you gnd the plow wires to the frame, your asking for trouble down the road.
     
  4. james.j.smith

    james.j.smith Senior Member
    from 19033
    Messages: 145

    the 4x4 is not even trying to engage was working all day and night friday then I took it out of 4X4 and tried to reengage it and it didn't work. It's not even indicating on the dash. Last time this happened It was the 4x4 modul. when I unplugged and plugged the wires from the modul it work staurday then quit agin. tried the 4X4 today and it's not working again. tried the unpluuging trick and it is still a no go.

    its not a indication issue since the 4x4 light comes on with all the other lights at start-up.

    why would ground to the frame cause me problems?
     
  5. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,972

    More resistance, over time this might give you problems
    Could be the motor going out on the t-case
     
  6. james.j.smith

    james.j.smith Senior Member
    from 19033
    Messages: 145

    Well I figured it out one of the relays under the hood was bad changed it out tonight and everything is working I'm just wondering if that was the issue a couple weeks again when ford changed out the module thanks for the replies
     
  7. Rick547

    Rick547 Senior Member
    from Indiana
    Messages: 535

    Some dealers believe in the random replacement of incriminate parts theory.