Forum Discussion

Canuck_Travelle's avatar
Oct 28, 2016

Disconnecting the Trailer Connection when staying Overnight.

Hi everyone, I have a question for you.

We have a Kodiak Travel Trailer and it has Dual Batteries in it, it is towed with a 2017 Silverado 1500.
I always disconnect the trailer's electrical cable when staying overnight at an un-serviced location like a Flying "J", Wal-Mart, etc.,and as a point to jog my memory put a card around the steering wheel so an old feller like myself can remember to plug in.

Question,do I have to do that or does the newer Trucks remember with software or hardware to not allow the truck battery to be siphoned off through the Trailer Connection?

Maybe I should try General Motors but thinking there is more expertise here concerning Trailer Connections, the new truck is really a large computer, quite awesome in some things but no mention that I can find with respect to this subject.

Appreciate any help or comments anyone might have.

34 Replies

  • ktmrfs's avatar
    ktmrfs
    Explorer III
    GM varies. The 6.6 diesels do NOT disconnect power. Gassers vary, I don't recall what my manual said exactly but I believe vary based on if you have the dual battery option or not.
  • Community Alumni's avatar
    Community Alumni
    My 2014 Ram does not pass thru power when the truck ignition is off. Having said that, I always pull the cable out anyway when we stop overnight.
  • Canuck Travellers wrote:
    Appreciate any help or comments anyone might have.


    Why guess? Put a voltmeter between Pin 4 (1 o'clock position) and Pin 1 (7 o'clock position) of your truck's Bargman connector then you'll know.
  • I know Ford does not pass power to trailer when truck is OFF.. but opening the doors of truck will also turn on trailer lights.

    I unplug every time...

    as a test .. I always do a parking light test walk around just before pulling out. and do a trailer brake test after 5 feet of moving truck/trailer.

    but that's me.