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Plugging fifth wheel into bumper plug?

partsman01
Explorer
Explorer
So on this 2003 GMC 2500HD that I bought recently I was finally installing the fifth wheel hitch and the brake controller, then I cut the tie straps from the wire harness between cab and box to hook up the fifth wheel plug, but before I did it, I noticed the plug at the back bumper hitch is the same, so installed the fuse into the fuse box under hood, then plugged in brake controller and I had power, then tried pushing the brake pedal and you could hear brakes humming on fifth wheel. S
o I am wondering if that is the plug I should use, I don't figure I will add the one at the front if this one is already set up and appears to take the load, anyone see any problems with using the factory hook up at the back receiver hitch?
I am thinking the wires should be all the same.
Any input?
Thanks
25 REPLIES 25

partsman01
Explorer
Explorer
Thanks again for the info

Dtank
Explorer
Explorer
Jack_Diane_Freedom wrote:
I plugged into the bumper plug for 5+ years when I had a 5er, no worries. Now have TT.


Ten years for me.

If you have a "V" (notched) TG - the cord from the 5th is "hanging" in
the "V".

I put a couple of half/hitches in a short bungee around the cord.
Ends of bungee are hooked to the bottom of the "V".
Keeps the "slack' inside the bed.

BTW - if I didn't have the "V" TG - I would still do the bumper connection.
(One less hole in the bed!)

Ditto on no problems (ever), no worries...;)

.

Itching2go
Explorer II
Explorer II
I have plugs both in the side of the truck bed between the hitch and the cab, and also the bumper. Started out using the one in the bed for aesthetic reasons, but ended up switching to the bumper. Reasons are..
1 - We lay our bikes between the hitch and the cab which causes access problems to the bed plug.
2 - The pigtail from the king pin hitch started to wear where it was rubbing against the front of the hitch.
3 - I found it a bit of a stretch to reach over the bed rails to plug in. Bumper is a lot easier to reach.

I do have a plastic cover for the top of the tailgate which eliminates the possibility of scratching the tailgate paint.

Works for me...
2008 Jayco Designer 35RLSA pulled by a 2007 Chevy 3500 D/A SRW

austinjenna
Explorer
Explorer
I use the one in the bed

2010 F350 CC Lariat 4x4 Short Bed
2011 Crusader 298BDS 5th Wheel
Reese 16K

ventrman
Explorer
Explorer
When I first started fulltiming, I had the Bumper Plug. The first Day it came loose and drug the Cord down the Road. It had to be replaced. I had Camping World install a Plug in the Bed of the Truck. I have had no more Issues.
God Bless!

Orezona
Explorer
Explorer
I use this in my current truck http://www.etrailer.com/Custom-Fit-Vehicle-Wiring/Chevrolet/Silverado+2500/2015/41157.html?vehicleid... And something very similar in my 02 Ford before. I just didn't care for the cord rubbing on the tailgate.
2015 Chevy Crewcab 2500HD Dirtymax
2009 8526RLS Flagstaff Classic Super Lite
Anderson Ultimate Fifth Wheel Hitch
B&W Turnover Ball

RustyJC
Explorer
Explorer
Either will work, but I've always used the 7-pin receptacle in the pickup bed. I use the 7-pin bumper receptacle to power the trailer repeater for the TST 507 tire monitoring system.

Rusty
2014.5 DRV Mobile Suites 38RSSA #6972

2016 Ram 3500 Dually Longhorn Crew Cab Long Bed, 4x4, 385/900 Cummins, Aisin AS69RC, 4.10, 39K+ GCWR, 30K+ trailer tow rating, 14K GVWR

B&W RVK3600

john_bet
Explorer II
Explorer II
I have been using the bumper receptacle for over 10 years now. No paint rubs or rub spots on cord to date.
2018 Ram 3500 SRW CC LB 6.7L Cummins Auto 3.42 gears
2018 Grand Design 337RLS

Pipeman
Explorer
Explorer
The plug between the cab and the box is an option that was added when the truck was built. It's included when you buy the camper(slide in) option. I had one in my 2001 and now in my 2011. I ordered it. I use the one in the back and put a pipe wrap on the cord which drapes over the Tgate. The front one is connected and is in the box if needed. When I had my 2001, I used that one exclusively.
Pipeman
Ontario, Canada
Full Member
35 year Fire Fighter(retired)
VE3PJF

Endricken
Explorer
Explorer
I never installed the in-bed plug I purchased as draping the cord over the tailgate is easy and convenient. I did install a tailgate "topper/protector" so the cord "rubs" against plastic and not the actual tailgate. I have a long bed truck and the cord always stays centered - its attached to the center of the pinbox so why would it move much?
Retired USAF
Silver 05 Dodge RAM LB CTD Dually 4Speed Auto SWD 3.73, Westin Sportsman Grill & Taillight Guards,Husky Mudguards, Retractable Ball Hitch, Onboard Air & Horns, MaxBrake - towing 2005 Keystone Montana Big Sky 3670 with Star Performance adapter

Water-Bug
Explorer
Explorer
Another advantage of using the bumper plug is that when disconnecting, you can pull the truck forward enough to have the pinbox clear of the truck bed, before disconnecting the brakes. When connecting up, you can connect the brakes before backing the truck bed under the pinbox.

laknox
Nomad
Nomad
I got an extension 7-way plug before I found out about adding another plug in the bed. Wish it had been the other way round. Not for aesthetic reasons, but because the damn cord will hang up on the bed corner and rip out the plug in a tight turn.

Lyle
2022 GMC Sierra 3500 HD Denali Crew Cab 4x4 Duramax
B&W OEM Companion & Gooseneck Kit
2017 KZ Durango 1500 D277RLT
1936 John Deere Model A
International Flying Farmers 64 Year Member

Oaklevel
Explorer
Explorer
Make sure that you do not leave a hitch in the receiver it can on a turn pull the pigtail out......... learned from experience..... use the in box box pug will never tow a fiver from the rear plug (bumper) unless I have too...... no tail gate paint rubs either.

partsman01
Explorer
Explorer
Thanks again for all replies, will try this trip coming up with it plugged into bumper and see how it goes, I like that it is not in the box where it could catch on something.

Bill