Found this

[Enrique Villalobos]

I found this sitting on one of my skid pan under the engine? WTF is this

 

[EMY92]

Blinker fluid reservoir, are your turn signals working?

 

[Littlefx4]

@tooldrmr2009 this was left in my truck when I got it. Any idea what it is & used for?

 

[tooldrmr2009]

@tooldrmr2009 this was left in my truck when I got it. Any idea what it is & used for?

It's your 7pin to 4 pin adapter as ford removed the 4pin connector to take the place of the trailer backup plug under your 7pin.

 

[Littlefx4]

It's your 7pin to 4 pin adapter as ford removed the 4pin connector to take the place of the trailer backup plug under your 7pin.

Thanks. It wasn’t with the rest of my goodies under the rear seat.

 

[tooldrmr2009]

Thanks. It wasn’t with the rest of my goodies under the rear seat.

No problem they sell other ones that might be smaller etc. I've heard people complain the 4pin might not stay secured into that big adapter but easily fixed with other options. I threw mine in the glove box with the fog light covers.

 

[MurderedOutSVT]

Old skool Super Nintendo Game catridge sleeve.

 

[nikhsub1]

It's the Fetzer valve reservoir.

 

[TurboM]

Those clear plastic caps are usually used to protect something prior to installation. Looks like it could be something that came with the main wiring harness, but that is a far-fetched guess. Use it as a coin holder until you figure out what it is

 

[RotorOver]

It's the Fetzer valve reservoir.

Look at the guck and muck on that windshield!