Hey everyone, been reading all of these great posts and did some basic troubleshooting. I too am have the P0410 code. If I connect a voltmeter to the plug that goes to the pump, I get nothing at all when the car is started. Should there be some voltage taking place there? Also, if I put 12v to the terminals on the motor itself, it just makes a buzzing noise, doesn't blow. Can someone guide me to what I should do next? I suspect the pump is shot so I'm going to replace it, but not having any voltage appear on those wires concerns me a little. I haven't taken out the relay yet to check it, figured if the pump wasn't working, no further troubleshooting until I resolved that. Thanks!