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2 pigtales?

Discussion in 'Flatbed Trucking Forum' started by Hurst, Nov 19, 2015.

Page 1 of 7
  1. Nov 19, 2015 #1
    Hurst

    Hurst Registered Member

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    Tampa, Fl
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    I've been meaning to ask this for a long time now and kept forgetting.

    I have 2 pigtales for power coming out the back of my Columbia. I bought the truck from my carrier and asked him what the second pigtale was for?? His response to me?

    "I dont know" "Play with it and see what it does"

    My trailer has 2 plugs for 2 pigtales. I plugged the 2nd pigtale into the other port to see if it did anything. If it does,.. I have no idea what it does. The trailer does not have any extra lights or strobes on the rear. I thought maybe it was to power strobe lights or something. The trailer does not have any other external power plugs either. The regular flat I had before the step I have now had a plug in the rear for plugging strobe lights in, yet did not have the 2nd plug like this one does.

    So what the heck do I have,. and whats it for?

    Hurst
     
    Hurst, Nov 19, 2015
    Hurst, Nov 19, 2015
    #1
    Son Thanks this.
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  3. Nov 19, 2015 #2
    Cottonmouth85

    Cottonmouth85 Bad Influence

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    Always wanted to put a 2nd one on for extra toys. I assume you've already taken a test light to the leads.
     
    Cottonmouth85, Nov 19, 2015
    Cottonmouth85, Nov 19, 2015
    #2
    Hurst Thanks this.
  4. Nov 19, 2015 #3
    damil

    damil Light Load Member

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    could be a pigtail for a electric tarp for a grain trailer any clue what the truck did in its previous life
     
    damil, Nov 19, 2015
    damil, Nov 19, 2015
    #3
    Hurst Thanks this.
  5. Nov 19, 2015 #4
    whoopNride

    whoopNride Road Train Member

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    Dump valve ?
     
    whoopNride, Nov 19, 2015
    whoopNride, Nov 19, 2015
    #4
    Hurst Thanks this.
  7. Nov 19, 2015 #5
    catalinaflyer

    catalinaflyer Road Train Member

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    Wichita, KS
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    I have 2 on my truck as well, the second one operates lift/dump axles on most of our trailers. I have a dedicated lift/dump switch then have a couple of the other pins wired to +12v switches on the dash that I use to power OD lights etc.

    Dump Switch.jpg
     
    catalinaflyer, Nov 19, 2015
    catalinaflyer, Nov 19, 2015
    #5
    Hurst Thanks this.
  8. Nov 19, 2015 #6
    TripleSix

    TripleSix God of Roads

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    I have 2 pigtails. One is the normal pigtail that all trucks have. The other is to power a steerable trailer.
     
    TripleSix, Nov 19, 2015
    TripleSix, Nov 19, 2015
    #6
    Hurst and Straight Stacks Thank this.
  9. Nov 19, 2015 #7
    MACK E-6

    MACK E-6 Moderator Staff Member

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    So do I.

    One powers the liftgate. :D
     
    MACK E-6, Nov 19, 2015
    MACK E-6, Nov 19, 2015
    #7
    misterG Thanks this.
  10. Nov 19, 2015 #8
    frt60

    frt60 Medium Load Member

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    If you take the vin number to frtliner they can print out a wiring diagram for you
     
    frt60, Nov 19, 2015
    frt60, Nov 19, 2015
    #8
    Hurst Thanks this.
  11. Nov 19, 2015 #9
    special-k

    special-k Road Train Member

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    Southern Ontario Canada
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    On my truck the second one was/is for antilock brake systems on some trailers. Its a 2000 379 pete. I've never had to use it for that. IIRC when they first came out with abs there was worries about powering up that circuit. Now they just get power off the brake light circuit when you step on the brake. I used to use mine for running extra lift axles on my trailer
     
    special-k, Nov 19, 2015
    special-k, Nov 19, 2015
    #9
    Hurst Thanks this.
  12. Nov 19, 2015 #10
    TaylorMade407

    TaylorMade407 Road Train Member

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    Dump valve more than likely
     
    TaylorMade407, Nov 19, 2015
    TaylorMade407, Nov 19, 2015
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    Hurst Thanks this.
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