The following wiring diagram applies for Gibson Pickup P-94R and P-94T models. Herein you will find brief illustration of the wiring system, standard humbucking operation, series-parallel switching, coil tap – humbucking switch.
The P-94 pickup comes with two insulated lead wires plus a bare wire twisted with a green lead (note: there may be a red wire included, this is a “dead” lead which you may cut). Connect either the white or black lead wire to the volume control and connect the other lead to ground. If you get a thin sound with both pickups in operation, you may need to change the polarity of the pickup. Simply reverse the lead wires to do this.
Find the detail of Gibson Pickup Wiring Diagram here (source: www.gibson.com)