Just installed an SH-1N '59 neck and a SH-4 JB bridge in an Ibanez RG421FM and getting a bunch of hum and static varying with level of distortion. Old pups had no static or anything though. I didn't wire it for coil splits, so my wiring is as follows: SH-1N single braided cable to switch HOT and braid to volume pot casing. JB green and bare to volume pot casing, red and white tied together and taped, black to HOT on bridge side of the switch. I may add, it's a 5 way 3SWLSC switch. I've tested with a multimeter, everything seems to be in check. My last option now is to reflow the ground cables on the pot casings and maybe that solves it. Any thoughts? Appreciate it.
Sorry if the cavity images aren't very clear.

Sorry if the cavity images aren't very clear.

