A 1993 mg104 washburn (usa built chicago cs). The original sd single died. I replaced it with a brand new ssl5. The 2 and 4 positions are thin sounding. Replaced the original custom/custom bridge with a brand new jb (love it) and the 2 and 4 are still mush. Wired exactly as the mg104 diagram shows. Reversed the leads on the ssl5 and still the 2 and 4 are thin. What do i need to do? Buying a new ssl5 rwrp is fine but i want to know if that will actually fix it.