Stratocaster pick guard setup with Schecter F500T pickups. Sound comes out of all pickups. Resistance reading for bridge pickup is 7.00. The other two pickups do not show a reading. This leads me to believe the tap portion of the pickup is not functioning correctly. This unit was fabricated in 1980 and both tapped and untapped channels for each pickup were tied together (see photo of back). All pickups, CTS pots, and CRL 5-way switch are of late 70's/80 vintage. Please email all questions. Thank you.