I just installed a Fender Original P pickup and the E/A side is quiet. It's brand new but has been in stock for several years. The G/D side has strong output but not the other half. Enough to hear and tune using a tuner but a big drop in volume. Using a magnifying glass I saw no breaks. I checked it with my headphone amp flipping the pick guard over and even unscrewed the pickup and held it in my hands tapping lightly with a screwdriver on the magnets. I don't have an ohm meter to measure it. Could it be partly shorting from being in storage for so long? I also reinstalled the old pickup and it works fine. I'll call the dealer monday but till then any advice would be helpful. Thanks in advance.