After mounting the w new fuel pumps in the wing roots I then had to wire the the pump switch. This is an ON-OFF-ON. I want to have a microswitch in the fuel selector valve that would automatically switch pumps with the valve position, but the area was just to limited in space and I needed a more secure location for any movement. The switch obtains power from either main fuel pump A/B switch. I opted for an OFF position in case of any problem with the wing pumps. The switch contains lights that show power to the pumps when selected.