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Old 10-02-2016, 10:24 PM   #1
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Had a bad experience with dielectric grease

I used dielectric grease on the 7 pin connector for the first time (and last time), (trailer side) when I returned from my last outing in June.

Getting ready to leave in the morning, I hooked up and plugged in. No trailer lights, none. After a couple of hours of screwing around, I concluded it was the connector. Finally got it working but it wasn't easy.

After doing some googling, I've found that there is quiet a bit of discussion about the application of dielectric grease. Some feel it's better used for permanent connections or tight fitting connections where the grease can't act as an insulator.

Anyway, no dielectric grease on my trailer connector again. I guess there is something to the saying; "If it ain't broke, don't fix it".
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Old 10-02-2016, 11:11 PM   #2
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I pack all my Molex style connectors with di-electric grease, spark plug boots and battery terminals too, but trailer connector cords... WD 40 only. Besides, WD smells good..lol

I use di-electric grease on the boot side of the connectors, on the lugged connections. Push to commect...WD.
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Old 10-03-2016, 12:05 AM   #3
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Quote:
Originally Posted by SidecarFlip View Post
I pack all my Molex style connectors with di-electric grease, spark plug boots and battery terminals too, but trailer connector cords... WD 40 only. Besides, WD smells good..lol

I use di-electric grease on the boot side of the connectors, on the lugged connections. Push to commect...WD.
Same. Di-Electric grease prevents corrosion from di (2 types of metals) making an electrical connection. It protects them from the outside air. It does not make for a better electrical connection.

You want to use a solvent to clean the connection. But your trailer plug will never be connected long enough at a time for the grease to be necessary.
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Old 10-03-2016, 12:14 AM   #4
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Always good to have an expert answer. Thanks.

I heard that WD 40 was good for arthritis but that could be a wive's tale...
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Old 10-03-2016, 12:57 AM   #5
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Quote:
Originally Posted by SidecarFlip View Post
Always good to have an expert answer. Thanks.

I heard that WD 40 was good for arthritis but that could be a wive's tale...
Only if taken as a suppository spray!
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Old 10-03-2016, 06:40 AM   #6
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Have always used Dielectric grease with no problems.......7 way plug for truck/5th wheel......satellite connections and any extension cords I use outside for my 5ver.
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Old 10-03-2016, 06:49 AM   #7
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Quote:
Originally Posted by SidecarFlip View Post
Always good to have an expert answer. Thanks.

I heard that WD 40 was good for arthritis but that could be a wive's tale...

I've heard that too....and the guy swears by WD-40 for his arthritis.

Back to topic. I've used dielectric grease for years on trailer plug connections without an issue. I use it on the rubber part of the toilet stopper when winterizing as well.
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Old 10-03-2016, 07:43 AM   #8
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Dielectric grease is a non-conductive, silicone-based grease that's designed to seal out moisture and prevent corrosion on electrical connectors. It also disrupts the flow of electrical current, which makes it good for lubricating and sealing the rubber parts of electrical connectors.

dielectric [dahy-i-lek-trik] a nonconducting substance; insulator.

Great to use on the inside boots of spark plugs
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Old 10-03-2016, 12:52 PM   #9
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This is quite long(and informative) so read it at your leisure.

Dielectric Grease vs Conductive Grease
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Old 10-03-2016, 01:36 PM   #10
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A good read and basically how I use it (before I read the article).
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