We just purchased a new tow vehicle (same make/model as our former TV, just younger) and the trailer's pigtail won't seat firmly into the socket on the truck. It's a 'blade' set of pins and the amount of pins and location of them are all matching and the pigtail goes in just fine but no amount of jiggling or pushing makes it go all the way in. We've tried a little WD-40 and that didn't make any difference. The plug cover (which is hinged to pull upon in a downward fashion) has a plug 'stop' that braces up against the pigtail in the right place but doesn't hold it securely at all. A few jiggles down the road and I'm sure this thing will disconnect. A search yields up that many people have the same issue and just use small bungee cords to secure the pigtail to the plug-cover where the 'stop' is. Not sure that this is the best answer. Do we need to replace the pigtail so that we get a secure/full seat on it when plugged into the new truck or is this as good as it's going to get?

Fix it once..right. New pig tail IMO. I did that when I purchased new truck. Slides in easily and is secure.

First do not use WD40!Not all connectors are interchangeable. The protective cover on many hold the connector in place.Make and model of truck?Some new rigs use somewhat of an adapter connecting the truck wiring to trailer connector. If equipped, insure the adapter is seated and the retainers are in place.

New vehicle? I would consider taking it back to the dealer and see what they think.

Search images on the web to find the correct plugs. It sounds like these are not a match.Once you find the correct match, go spend $10-15 for the correct plug and wire it up. You can find the wiring diagrams online and it's pretty simple.A bungy cord and a prayer are not a good solution.

Look on the Cover on the truck receptacle. Then buy same brand 7 pin plug for your umbilical cord and swap plugs

Pigtail not fitting.... | Good Sam Community

Lwiddis
Explorer II
Oct 18, 2020
Fix it once..right. New pig tail IMO. I did that when I purchased new truck. Slides in easily and is secure.
enblethen
Nomad
Oct 18, 2020
First do not use WD40!
Not all connectors are interchangeable. The protective cover on many hold the connector in place.
Make and model of truck?
Some new rigs use somewhat of an adapter connecting the truck wiring to trailer connector. If equipped, insure the adapter is seated and the retainers are in place.
time2roll
Nomad
Oct 18, 2020
New vehicle? I would consider taking it back to the dealer and see what they think.
valhalla360
Navigator
Oct 18, 2020
Search images on the web to find the correct plugs. It sounds like these are not a match.

Once you find the correct match, go spend $10-15 for the correct plug and wire it up. You can find the wiring diagrams online and it's pretty simple.

A bungy cord and a prayer are not a good solution.
Old-Biscuit
Explorer III
Oct 19, 2020
Look on the Cover on the truck receptacle.
Then buy same brand 7 pin plug for your umbilical cord and swap plugs
TheBeans
Explorer
Oct 19, 2020
Lots of great advice here---thank you, everyone! We really didn't like the whole bungie-and-a-prayer idea so we're glad to see there are other things we can do first! I'll keep you posted if we run into other problems as we try to get this resolved.
Fisherman
Explorer
Oct 19, 2020
TheBeans wrote:
We just purchased a new tow vehicle (same make/model as our former TV, just younger) and the trailer's pigtail won't seat firmly into the socket on the truck. It's a 'blade' set of pins and the amount of pins and location of them are all matching and the pigtail goes in just fine but no amount of jiggling or pushing makes it go all the way in. We've tried a little WD-40 and that didn't make any difference. The plug cover (which is hinged to pull upon in a downward fashion) has a plug 'stop' that braces up against the pigtail in the right place but doesn't hold it securely at all. A few jiggles down the road and I'm sure this thing will disconnect. A search yields up that many people have the same issue and just use small bungee cords to secure the pigtail to the plug-cover where the 'stop' is. Not sure that this is the best answer. Do we need to replace the pigtail so that we get a secure/full seat on it when plugged into the new truck or is this as good as it's going to get?

If it worked fine in your old truck, I would be suspecting the newer truck and its trailer plug connector. Make sure the blades are on the proper side of the socket in the bumper, might just be a very small amount of adjustment needed.
opnspaces
Navigator II
Oct 19, 2020
TheBeans wrote:
The plug cover (which is hinged to pull upon in a downward fashion) has a plug 'stop' that braces up against the pigtail in the right place but doesn't hold it securely at all. A few jiggles down the road and I'm sure this thing will disconnect.

I've never seen an outlet where the door swings down. Are you sure it's not upside down on the bumper?
midnightsadie
Explorer II
Oct 19, 2020
x2
mkirsch
Nomad II
Oct 20, 2020
opnspaces wrote:
I've never seen an outlet where the door swings down. Are you sure it's not upside down on the bumper?

All 2014 and up Chevy Silverado trucks with factory wiring have a door that swings down. The trailer receptacle is a combination 7-pin and 4-pin unit, with a hinged door in the middle. The 7-pin door swings down, and the 4-pin door swings up.