Yes. Wisconsin police can pull over a vehicle with Illinois plates if the registered owner's Wisconsin driving privileges are revoked or suspended.
According to the Wisconsin Department of Transportation, if your Wisconsin license is revoked or suspended, you are prohibited from driving anywhere in Wisconsin—even if you hold a valid out-of-state license. The revocation applies to the person, not the plate.
Note: Laws vary by state. Consult an attorney or the DMV for jurisdiction-specific advice.