I have a 1984 Volvo DL wagon that won't start. The problem seems to be the wire supplying power to the in tank fuel pump. The relay works and the pump makes the usual noise when power is jumpered to it. But the blue wire going to the "common" on the relay switch has no power. Does the in tank pump stay on constantly, or does it switch on and off as needed. I'm temted to jumper power from the relay coil 12V to the relay switch to power the pump. Please help. Thank you for your time!
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