Fuel Pump Won't Shut Off

[mike knight]

Here are the facts:
Electric fuel pump (weldon 2025) which is easily heard at idle starts to rattle loudly. I drain the tank and pull the pump checking the brushes. Brushes show some wear but not excessive. I didn't want to lose any drive time this time of year in the midwest so I bought another pump. What the heck I put the new pump in service and it runs perfect. While test driving the car in my neighborhood the engine quits abruptly. I check the fuse and it's blown so i replace it. Pump is working again but it won't shut off when i kill the ignition.
I replaced the relay but that doesn't solve the problem. In order to kill the pump I have to pull the relay after engine shut down. This is becoming a big PIA. I put a meter on the disconnected battery to see if I have any draw down but the meter reads 0. Since there are only two wires coming out of the pump, one orange and one black and it's wired exactly as the old pump, orange to positive and black to a frame ground, I feel confident that I didn't wire it incorrectly.

Any ideas out there about what might cause this? I really don't like the idea of draining the fuel tank again as that is a huge PIA not to mention safety. I do have a 4 post lift so I can get under the car easily. The original pump is on its way to weldon for inspection and rebuild if necessary.
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