Bombardier CL-600-2B16 Challenger – Electrical Fire

2-ODAY, a Bombardier CL-600-2B16 Challenger 601-3A aircraft operated by Volare Aviation, was conducting flight VLZ556 from San José/Norman Y. Mineta San José Intl, CA (KSJC) to Toronto/Lester B. Pearson Intl, ON (CYYZ). During the approach at CYYZ, the left side Primary Flight Display (PFD) image became distorted and flickered. Moments later, the flight crew noted the smell of burning electrical wiring. EFIS 1 was then deselected and the burning electrical smell dissipated. The flight crew declared a PAN PAN and the aircraft landed without further incident.