6 replies to this topic

[hkyfsh]

Anyone have luck pulling the 3 pin connector off and splicing into a 7 Pin RV Blade, similar to this?

 

https://www.curtmfg.com/part/56601

 

I can't seem to get the running lights to go, but I think its because the truck doesn't recognize anything hooked up to it so the plug isn't "activated" for some reason.  When I test with a multimeter there seems to be power on the 12V auxiliary wire but when the running lights are on, no power to that wire.

[Colorado Mark]

Check the plug on the truck.  With the running lights on, is there power at pin 3, top left (about 11 o'clock position) on the truck end?

 

If not, check the under-hood fuse panel.  Newer trucks have separate fuses for the trailer plug so you won't lose your vehicle running lights if there is a problem in the trailer.

[Colorado Mark]

Also, since this is a 2020, GM uses a trailer light control module.  The module may need to be reprogrammed due to differences in load.

 

A camper does not have as many running lights as a trailer would have.  

[Bjammin]

I bought the standard electrical connection kit from FWC.  The three pin "outboard motor" connector supplied power to the camper, but a separate wire was connected to the trailer lighting interface on the tailgate, thus allowing the running lights to function in tandem with the truck lights.  I'm not sure a multi-connector like the one you've shown would get you anywhere unless you ran a wire from that back to the trailer hook-up.

[DavidGraves]

With running lights always make sure the camper body is grounded to the truck.

 

I don't know anything about newer truck electrical but the lights on older campers need the camper frame grounded to the truck frame.

 

Hope this helps.

 

David Graves

[Oilbrnr]

Meh, this is going to be a modern GM trailer sensing issue. I'd look on other forums regarding this. It's probably is looking for some sort of load change on certain pin combo. LED's can be tricky, but even new small utility trailers come that way, so do a search. There is no reason it won't work or that you can't trick it.

[hkyfsh]

Thanks all.  Its definitely with the newer GM Trailering sensing. I opened this in a GM thread as well.  Below seems to be my solution without having GM reprogram the Trailer Module.  Also if anyone else has a 2020 GMC Sierra with the 360 Camera package.  I found a site that has a camera to complete the circuit when the tailgate is removed without having to pull the camera out of the tailgate.

 

Looks like if you hook this up to the 7 pin it thinks there is a trailer attached and gives me the functionality I want.  Not sure if it would screw something up in the long run, but it has built in resistors to make it seem like something is attached.

 

https://www.amazon.c...0?ie=UTF8&psc=1