Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

tailgate motor

Discussion in 'The Garage' started by 84gmcjimmy, Jun 30, 2006.

  1. 84gmcjimmy

    84gmcjimmy 1 ton status

    Joined:
    Dec 3, 2003
    Posts:
    12,838
    Likes Received:
    0
    Location:
    B.C. CANADA
    Hello all.

    For some reason out of the blue my tailgate motor in my Jimmy (1984) doesn't work. I can't get it up or down with the inside control or with the key. BEFORE I could do it with the key every time, now it doesn't do anything, and I can't hear any sounds. This is while the truck is running so the battery has nothing to do with it.
    What can I do to fix this? I need to get the window down ASAP...

    Thanks
     
  2. blackblazer717

    blackblazer717 1/2 ton status

    Joined:
    Jul 1, 2004
    Posts:
    470
    Likes Received:
    0
    Location:
    massachusetts
    hummm,
    did you check for power at the connector in the back going to the tailgate? underneath the inspection cover? while you have someone pushing the button or turning the key?
    LUKE
     
  3. 2Dogs

    2Dogs 1/2 ton status Premium Member

    Joined:
    May 4, 2001
    Posts:
    3,470
    Likes Received:
    35
    Location:
    Ca
    Take the cover off, inspect everything. From the tailgate open/down position you can roll the window up and down (get something or someone to support the window). Remove the cable at the motor side and attach a drill motor to the cable. You should be able to run it up and down with no problem. This also will be a good problem determination exercise.

    This will work with the tailgate up also - just not as easy.
     
  4. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,167
    Likes Received:
    1,365
    Location:
    E-town baby!
    Is the tailgate firmly latched? There is an interlock switch that prevents the window from working if the tailgate isn't firmly shut...

    Rene
     
  5. 84gmcjimmy

    84gmcjimmy 1 ton status

    Joined:
    Dec 3, 2003
    Posts:
    12,838
    Likes Received:
    0
    Location:
    B.C. CANADA
    The tailgate is loose, I will wiggle it around a bit. The hinges are hooped so it doesn't latch properly.
    It's in the up position so I cannot open the tailgate.

    Thanks
     
  6. ryoken

    ryoken Puppy Fabricator Premium Member GMOTM Winner

    Joined:
    Jun 13, 2003
    Posts:
    29,621
    Likes Received:
    1,371
    Location:
    Jersey Shore
    What's with this "hooped" term all of a sudden?
     
  7. Cornfield creations

    Cornfield creations 1/2 ton status

    Joined:
    Oct 19, 2005
    Posts:
    1,283
    Likes Received:
    0
    Location:
    Jasper, Indiana
    Take the plate off and check everything like was previously mentioned. I used to not be able to lower mine but with the switch. After I took the esutcheon Off I found that a wire wore through on the key cylinder and it was grounding out on the tailgate.

    Once you get it open You can raise the window up with the tailgate down by flipping out the latches, have someone hold the window with you do that.
     
  8. 84gmcjimmy

    84gmcjimmy 1 ton status

    Joined:
    Dec 3, 2003
    Posts:
    12,838
    Likes Received:
    0
    Location:
    B.C. CANADA
    I have been out at this lake with my moms boyfriends family a lot, and some of there friends say that word so it wore off on me...:doah:
     
  9. tiger9297

    tiger9297 1/2 ton status

    Joined:
    Jul 23, 2004
    Posts:
    1,205
    Likes Received:
    0
    Location:
    Tupelo, Mississippi
    If your motor is out good luck. They aren't available anymore. The local GM dealer got me a rebuilt one from somewhere in TX. I tried 3 different motors and none of them had the power to lift the window. That's after I had them install all new hardware and tracks. I don't know what the solution is to that problem.
     
  10. spearchucker

    spearchucker 1/2 ton status

    Joined:
    Nov 17, 2003
    Posts:
    1,556
    Likes Received:
    0
    Location:
    Bay area, CA
    Entertain this thought. The ground for the window motor is the motor casing itself. If your hinges/tailpan are rusty then there will be significant resistance for the ground. Try running a 10 or 12 gauge wire directly from the motor casing, through the existing wire harness for the window motor, and ground it to the bare metal on the frame. See if that helps. I haven't tried this since mine works fine, but it's just a theory I've always had.
     
  11. tiger9297

    tiger9297 1/2 ton status

    Joined:
    Jul 23, 2004
    Posts:
    1,205
    Likes Received:
    0
    Location:
    Tupelo, Mississippi
    Now that I think about it there is some rust on the hinges. I'll definitely try that. Thanks. :bow:
     
  12. spearchucker

    spearchucker 1/2 ton status

    Joined:
    Nov 17, 2003
    Posts:
    1,556
    Likes Received:
    0
    Location:
    Bay area, CA
    Don't forget to report back to let us know if that helps. :wink1:
     
  13. 84gmcjimmy

    84gmcjimmy 1 ton status

    Joined:
    Dec 3, 2003
    Posts:
    12,838
    Likes Received:
    0
    Location:
    B.C. CANADA
    UPDATE

    Well I finally clued in and took the cable off the motor and hooked it up to a drill. That worked, I rolled it down like that. It was so simple, but so neat how it worked...

    Took the motor out and tested it with 2 wires and the battery... it didn't move or make a single sound...so I am guessing it's dead.

    Used a test light with the 2 wires that connect into the tailgate motor, none of them had juice so I don't know where they lost the juice. All this was done with the tailgate open, which I am assuming wouldn't affect the outcome?

    What can I do?
     
  14. 84gmcjimmy

    84gmcjimmy 1 ton status

    Joined:
    Dec 3, 2003
    Posts:
    12,838
    Likes Received:
    0
    Location:
    B.C. CANADA
    Made a WTB post in the classified area for a motor.

    Anyone lend a hand in telling me what to do?
     
  15. sandawgk5

    sandawgk5 3/4 ton status

    Joined:
    Oct 28, 2003
    Posts:
    6,881
    Likes Received:
    1
    Location:
    Kitsap County PACNORWEST
    You need to make sure you have the switches by the tailgate latch tripped to allow power to the motor if the tailgate is down. There is an interlock to keep you from operating the window with the tailgate not fully locked in the up position.

    Ira
     
  16. 84gmcjimmy

    84gmcjimmy 1 ton status

    Joined:
    Dec 3, 2003
    Posts:
    12,838
    Likes Received:
    0
    Location:
    B.C. CANADA
    So power will not go to the window AT ALL if the tailgate is down? Where is the interlock thing I need to disable while the tailgate is down?

    Can you confirm this...
    With the tailgate open, and the interlock not tripped, I will have NO power, nor will I have any power in the wires while using a test bulb? I need the tailgate closed or the interlock tripped before I can test it or use a test light?

    Thanks
     
  17. sandawgk5

    sandawgk5 3/4 ton status

    Joined:
    Oct 28, 2003
    Posts:
    6,881
    Likes Received:
    1
    Location:
    Kitsap County PACNORWEST
    That is correct. All I do is trip the lock as if the tailgate is up and latched. I have never had any problems doing it this way.

    Ira
     
  18. 84gmcjimmy

    84gmcjimmy 1 ton status

    Joined:
    Dec 3, 2003
    Posts:
    12,838
    Likes Received:
    0
    Location:
    B.C. CANADA
    Thanks I will retry it like that.
     
  19. goldwing2000

    goldwing2000 Guest

    You know that both wires inside the plug are positive, right? The ground is to the body of the motor itself.

    If it really is busted, Autozone sells them for $54 with a lifetime warranty. I don't why everybody thinks they're so hard to find.

    CARDONE_REMAN Lift Motor - Window for a 1984 GMC Truck Jimmy 4WD
    Unit Price: $53.99
    Core Value*: $30.00
    Part No.: 42-20
    Weight: 4.5 lbs.
    Warranty: LLT


    Definitely be sure you check for a good ground, too. That's what was wrong with mine when I bought it.
     
  20. 84gmcjimmy

    84gmcjimmy 1 ton status

    Joined:
    Dec 3, 2003
    Posts:
    12,838
    Likes Received:
    0
    Location:
    B.C. CANADA
    Didn't know that about both being positive... so I need to connect two wires from the positive end to those plugs to test it out of the tailgate? How do I check the ground since the ground is the case itself, is it inside or how can I clean it or fix it?

    Thanks'

     

Share This Page