Tail Light

**gbkims** · 07-09-2018, 07:53 AM

Originally Posted by Dick 641

Here is a picture of end of trailer plug Attachment 13794 This is what I found I have always stored the cord in the pin box when not hooked to truck an never had a problem until now, thinking of getting another female end an mount it on pin box to plug the cable in when not hooked to the truck. Have never heard of anyone else having this problem that I can remember.

OK, that's way more corrosion than I was expecting to see.
Must have sat in the water like you said.

**Dick 641** · 07-09-2018, 08:32 AM

Rob... Thanks for the link, will have to get one ordered , having a spare is a good idea

Originally Posted by Cate&Rob

Dick 641 . . . Yup, that would do it

.
Some on this forum have had good results with this replacement cord and better than OE junction box.
(I bought one just to have for a spare!)
http://mictuning.com/7-way-inline-tr...ord_p0336.html

Rob

**WhittleBurner** · 07-09-2018, 11:04 AM

Yea it would be a good idea to get a spare. Who knows how far up that kind of corrosion could have gone.

**Rapid1** · 07-09-2018, 01:46 PM

Originally Posted by Dick 641

Here is a picture of end of trailer plug Attachment 13794 This is what I found I have always stored the cord in the pin box when not hooked to truck an never had a problem until now, thinking of getting another female end an mount it on pin box to plug the cable in when not hooked to the truck. Have never heard of anyone else having this problem that I can remember.

After seeing that corroded plug, I would put a new one and toss the original...or maybe keep it for a spare depending on how it cleans up.

**Dick 641** · 07-09-2018, 03:46 PM

Wasn't even thinking of using it, got a new one ordered. If you look close one of the connectors is completely gone never seen anything like this before.

**Cate&Rob** · 07-09-2018, 03:58 PM

Dick 641 - That looks like electrolytic corrosion. Which would be quite possible with DC voltage present, if the end of the cord was dangling in salty water. A new cord and making sure it stays dry when stored, sounds like a good plan.

Rob

**Dick 641** · 07-09-2018, 04:02 PM

Don't know where the salty water would come from haven't been anywhere close to the oceans.

Originally Posted by Cate&Rob

Dick 641 - That looks like electrolytic corrosion. Which would be quite possible with DC voltage present, if the end of the cord was dangling in salty water. A new cord and making sure it stays dry when stored, sounds like a good plan.

Rob

**Cate&Rob** · 07-09-2018, 04:23 PM

Originally Posted by Dick 641

Don't know where the salty water would come from haven't been anywhere close to the oceans.

Road salt could do it . . . I wonder if there is a puddle in the pin box that doesn’t get flushed out? The salt would stay, even if the water evaporated.

Rob

**Dick 641** · 07-09-2018, 06:45 PM

I've never pulled in winter or any bad weather but could see that happening.

Originally Posted by Cate&Rob

Road salt could do it . . . I wonder if there is a puddle in the pin box that doesn’t get flushed out? The salt would stay, even if the water evaporated.

Rob

**The Buergers** · 07-09-2018, 07:40 PM

WirthCo 20081 7-Way Trailer Plug Cover, 1 Pack https://www.amazon.com/dp/B072J5VZ4C..._ZJ-qBbRJVJ5RF

I use these 7-way covers on my work trailers. I add a dab of dielectric grease from time to time to help keep moisture out during extended storage periods. I like the notch to secure to the cable while towing.

Just a thought on electrolysis... the 7-way is connected to the + and - of the batteries correct? Sitting in water in pin box could be source of electrolysis. My $0.02 for today.