Sorry for late reply's but I found the problem. After physically tracing the water line here is what I found. The water line comes in on the slide out on the driver's side. It goes towards the back to the water heater which is under the wardrobe cabinet. Just before the water heater the line has a T which sends water to the outside shower (cold water worked there), the water heater (worked fine) and a line that goes through a hole under the sofa on the slide out across to the passenger side of the camper (as does the hot water line also from the water heater). Under the couch where the water lines go down under the floor, there is also a drain pipe for the washing machine (which was added prior to my purchase) and the drain line was sitting on top of the cold water hose pinching it. I guess with the summer heat, the line got soft enough to allow the weight of the drain pipe to smash it down. Turned out to be an easy fix just took a little effort. Thanks for the replies.
Forgot to mention, the electric pump is on the passenger side and ties in to the water line on the passenger side so it was allowing the water from the potable water tank to get to the sink, toilet, etc.
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