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Old 06-10-2021, 02:46 PM   #1
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7 pin Trailer Plug underperforming

Day 10 of a 30 day trip. The trip started out with satisfactory trailer brakes and by day 3 they were non existent. I found the copper terminals in the connector had spread open to the point they no longer made contact with the receptacle on the 2020 Explorer. After squeezing the soft copper contact blades together everything worked again! Had to back off the controller setting as the connection was so good. This is standard procedure every time we hook up now.

This issue has to be more widespread than our 2021 Surveyor. Has anyone found a good replacement?

No, it is not going to a dealer, I will do it myself with the best parts I can buy.

Side Note, This 12V compressor refrigerator is the second best thing to sliced bread. Hard Ice Cream!!!
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Old 06-10-2021, 03:34 PM   #2
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Most 7 blade plugs have a place on them for the lid/cover to hold them in place.
Are you pushing yours in far enough for the lid to latch/lock the plug in place?
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Old 06-10-2021, 04:15 PM   #3
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Over the years I've found it beneficial to replace the connector on the cord as well as the receptacle on the vehicle periodically.

They tend to grow corrosion from exposure to the elements and even if you scrape the contacts regularly they loosen and contact is poor.

Rather than replace the entire cord new ends are available, just get the best one available rather than the cheapest. Same for receptacle although often those need to be purchased from the Vehicle's Dealer Parts Dept, unless you want to do the rewiring to fit a generic receptacle.

One more item, the mfr's of the brake controllers recommend only a #14 wire for a two axle brake system. While re-wiring it might be a good idea to run at least a #12 wire from controller to receptacle as well as increasing the ground wire size. Brakes work best with no resistance (or very little) between controller and brake magnets.
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Old 06-10-2021, 10:42 PM   #4
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Quote:
Originally Posted by 5picker View Post
Most 7 blade plugs have a place on them for the lid/cover to hold them in place.
Are you pushing yours in far enough for the lid to latch/lock the plug in place?
The two are properly mated, I will rephrase the issue, The plug as provided on the 2021 Surveyor Is Chinese Junk. The imbedded electrical connectors are made of soft copper and they have no ability to grip the terminals in the receptacle or retain there design shape.

I view this to be a serious safety issue that maybe widespread in the industry and am trying to alert others to verify braking ability after hooking up.

Frank G
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Old 06-11-2021, 06:28 AM   #5
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On a previous camper I had trouble wit the cord end, tried everything and nothing was a permanent solution. I changed the entire cord and the problem was solved.

I like the idea of the end being molded to the cable so no moisture can get in to corrode the connections.

Etrailer has this cord listed. it is 8', they have shorter and longer if that is what you need. Easy to change it out in the connection box too.

https://www.etrailer.com/Wiring/Migh...d/A10-7W8.html

Also have you applied dielectric grease to the plug and pins? It will help keep the connections good by keeping moisture out and so the corrosion from developing there too.
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Old 06-11-2021, 03:23 PM   #6
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Quote:
Originally Posted by FrankG View Post
Day 10 of a 30 day trip. The trip started out with satisfactory trailer brakes and by day 3 they were non existent. I found the copper terminals in the connector had spread open to the point they no longer made contact with the receptacle on the 2020 Explorer. After squeezing the soft copper contact blades together everything worked again! Had to back off the controller setting as the connection was so good. This is standard procedure every time we hook up now.

This issue has to be more widespread than our 2021 Surveyor. Has anyone found a good replacement?

No, it is not going to a dealer, I will do it myself with the best parts I can buy.

Side Note, This 12V compressor refrigerator is the second best thing to sliced bread. Hard Ice Cream!!!
I had the very same problem on My Flagstaff 8296FKSS. REolaced the plug last night.
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