Hello! Today I got 2 fender jaguar 62 AVRI reissue for my MIJ jaguar. I wired them "by the book", black wires to ground and yellow wires to the switches. Sound great when I play on bridge pickup OR the neck pickup and I can really hear difference between the AVRI to the MIJ pickups. Cool! The big problem is when I turn on both pickups (neck & bridge), the volume is getting low and the sound is thin and ugly. Any ideas why?