Four wheel drive won't engage

Discussion in '1995 - 2004 Toyota Tacoma' started by CSC, May 23, 2018.

  1. CSC

    CSC New Member

    Hi guys. This is my first post on the forum. I have a 99 Tacoma TRD with five speed manual tranny. When I shift into 4H nothing happens...nothing no blinking light, no solid light, no light at all. Similarly, the rear diff locker just blinks but does not engage. Any thoughts on working through the trouble shooting are appreciated! Thanks!
     
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  3. Bogunn

    Bogunn Well-Known Member

    Welcome to the forum.
    It could be the 4x4 actuator.
     
  4. whippersnapper02

    whippersnapper02 Negative Nancy

    Push button on the shifter? Might be a bad fuse.
     
  5. OR17TRD

    OR17TRD Well-Known Member

    Welcome to the forum. Are you driving when you turn 4H on? You have to be moving for it to activate. You have to have the truck in 4L to activate the rear diff. If you haven’t used it or don’t use it often it can take up to 50 feet or so before it will lock in. Once it’s locked in unlock it and lock it and repeat a few times to see if it activates faster.
     
  6. OP
    CSC

    CSC New Member

    Thanks for the welcomes. I'll give it a try. I was not moving last I tried but seems like I'd at least get a blinking 4 wheel drive light.
     
  7. OR17TRD

    OR17TRD Well-Known Member

    You’ve got to be moving for it to activate.
     
  8. muffly20

    muffly20 New Member

    I had the same issue in my 03, it was the actuator. About 350 bucks to fix, but I also read that you can take it off and apart and there is a power wire that often comes loose that you can just sauter back on.
     
  9. OP
    CSC

    CSC New Member

    Thanks Muffy20. I read the same and will be looking into that down the road. My issue turned out to be an electrical connection on the upper passenger side of the trans that was left unplugged by the dealer when they last worked on the trans :(.
     

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