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Wayne Sieber

Trailer Light Plugs

12 posts in this topic

Does anyone else have trouble with trailer light plugs corroding? It seems like everytime I check my lights that the plug (on the truck and the trailer) need to be scraped and cleaned to get a good connection. Does anyone have any tricks they use to keep them clean?

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I use white lithium grease. Just apply it every now and then.

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I bought a cleaner spray and the grease stuff. Seems to work pretty well if you clean them real well before you apply the grease.

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Lithium greese is a good choice but will attract dirt so when not connected to a trailer, it's a good idea to use a cover on the vehicle connector so it stays clean.

Bob

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I have never replaced a plug due to corrosion on my own stuff. A little dab of di-electric grease (or any grease) will due the trick. Yes it does attract dirt but it can be wiped off to find shiny terminals underneath!! I apply a little on every harness I replace at the shop also.

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I suggested the cap on the vehicle side because that is the female which is not as easy to wipe out. Only the dc common on the vehicle is male.

Bob

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Use either a cap over the plug or cut the wires off a mating connector and plug that in to keep things clean.

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7 way - males on the truck side.

A little brake cleaner will take car of the dirt (minimal and likely will not affect the plug anyways) that has accumulated on the grease in your 4 flats. Reaply to your shiny terminals and your good for another season!

Good idea Bigdog!

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FEETDOWN, Clean your contacts(male and female)REAL good and coat them with Di-electric grease (available at any auto or farm store). It "conducts" electricity and protects against corrosion. I coat all my trailer plugs with the stuff in Fall and have yet to have a failure. Phred52

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I don't believe that dielectric grease conducts electricity, but it does help seal the connections to keep moisture out.

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That is correct. Di-electric does not conduct electricity. Its main function is a moisture block with limited lubrication properties. It also works great on those fuel pump module seals that gm uses. If you have ever replaced one you'll know what I am talking about. A little grease on that seal and the pump pratically falls into place.

Its also great for most other electrical connection that you want to keep corrosion free. I also use it in the spark plug boots to keep the towers on the coils/caps from corroding. it also makes the boots easier to install on the spark plugs.

You can find all kinds of uses for this stuff. A must have in any garage!!

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Guys - Thanks for all this information! My days of scraping clean the plugs everytime I get the trailer out looks to be over!!

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