I drove into Carson City NV from the Bay Area CA. The temp droped to about 32 degrees overnight. The next morning I went out to my truck and found coolant leaking from the passanger side rear of the truck. It looked like it was coming from above the cover and dripping down. The next days I did not see any coolant leaks. I had to top off the resivoir. What could this be.

2005 Expedition XLT

 

like the back of the truck.!
back below the cargo area.?

 

Yes at the back of the truck behind the rear wheel. I see some hoses up there

 

heater hose to rear heater

 

Ditto - replace both hoses.

 

yes
and check the clamps too.
not many of my newer trucks leak when weatehr changes but the older ones always do each year when we cool down. just have to tighten down the clamps some.

 

wiper coolant

 

I will check the heater hoses. Hopefull that is it. Just wonder why it only leaked that night (a lot) and now has not leak since. It has been week since the incedent.

It is not the wiper fluid. It is the green coolant that is leaking, plus I had to top off my resevoir.

 

let me know if you find OEM heater hoses to the rear end for the Expedition. I couldnt find them online

 

Rear window washer has a line that runs down the side of the truck to the back window washer. If that line is broken or cracked it would leak fluid.