Electrical Problem???

[TouchdownTN]

I'm getting ready to replace my second front wiper motor, and my rear glass wiper system only works when the switch is pushed in to spray fluid on the rear glass. I have replaced the relay under the hood and checked the fuses under the hood and inside the cab fuse panel. My H2 is a 03 and I'm getting to the point where I'm thinking about selling it due to these constant elecrical problems. What should I check first? No other electrical issues just the front and rear wiper issues. I thought it might be the switch but the front and rear switches are independent of each other. Anything I should point my mechanic to??? Any help at all would be very greatly appreciated!!!