HWH slide no work

I have a single slide wont go in or out. Air leveling. Pump does no run not even a clicking noise to be heard. I tried the trouble shooting guide that is on line but no luck. I have power from the slide room key. My extend/retract switch has power on the middle two contacts. If I flip the switch while using a test light to ground and touching either the top or bottom contact and press switch the test light will light for a milli second and that's it. I have power at the pump and pressing the switch in either direction cuts that power to pump. I installed a new switch and it does the same thing.