Thats a big help. I am currently working on the pump and have it on the bench. I removed the pump wires from the circuit board and put 12 volts directly to the pump and it works like a champ.
Now I'll check out the wires you mentioned and recheck the fuses.
Where are the microswitches located? On the circuit board inside the pump housing?
1993 190E 2.3
2000 Toyota 4x4 Tundra