Does the buzzer sound when there is a connection or when there isn't one. Mine makes noise only when there is a connection. So there should be continuity between the 2 wires, but not between either of them and ground. With just the switch on the coil wouldn't be activated. There are sensors that need 6% slippage at the rear wheels before the fronts activate. If you want to test the coil, provide a 12v source to the power side and a good ground on the other side.
I can look at my wiring diagrams if you want to. Don't have it in front of me.
Mine: 2018 Sportsman 850SP - 26" Bear Claw HTRs on OEM steel wheels(I really don't like the Aluminum ones)
Polaris Hand warmers, Mirrors.
Hers: 2007 Sportsman 500 EFI, Polaris Winch, 26" Bear Claw HTRs on Moose 427x Wheels. QSC Clutch Kit, Hand Warmers
2001 Magnum 325 MOSE 12" rear wheel conversion. 25" Sedona Coyote tires
2001 Magnum 325 Warn winch and Moose 60" plow
2017 Polaris Ranger 1000XP - Roof and front glass
SOLD 2004 Sportsman 600 Twin