Low Coolant Light on..After Cleaning My Engine..?

95 4.6, today i changed my plugs, and cleaned my engine with degreaser...the usual bag over the alt....but i didn't cover some electronic boxes..including the main fuse box..

Anyway, everythings done..nice and clean..and shiney, but after i drive for like 10mins..the low coolant light comes on, and stays on. I shut the car, it's not there...comes back in 10 mins..

Do you thing thats fuse related..? When i disconnected my battery before the wash, i hit the positive terminal with a metal bit, and it sparked...do you thing thats the reason..? No other problems. Everything is fine also, coolent wise. Maybe there is some water in that little connecter sensor at the bottom of the coolant resivoir..?

nevermind, it was some water on the sensor thats at the bottom of the refill tank..eveything cool.

BTW, i highly recomend greased lightning degreaser (blue bottle) for cleaning, and this stuff called CD2 engine detailer-it's in a silver aerosol can, similair to like a foam tire shine, but it's for the engine.....my baby looks beautiful.