What was found
A SMOKY ODOR NOTICED IN COCKPIT WHEN CREW TURNED ON ENGINE ANTI-ICE & IGNITION DUE TO WEATHER WHILE EN ROUTE. CENTER AUTOPILOT TRIPPED OFF & F/O'S AIRSPEED INDICATOR FAILED. ODOR BEGAN TO DISSIPATE. WHEN WEATHER CONDITIONS ABATED IGNITION & ENGINE ANTI-ICE WERE TURNED OFF. OPS OF AUTOPILOT & F/O'S AIRSPEED INDICATOR RETURNED TO NORMAL. FLT CONTINUED & LANDED WITHOUT PROBLEMS. MX INSPECTED ALL C/B OVERHEAD PANEL WIRING, BOTH ADC'S AND BUSS TIE BREAKERS WITH NO TROUBLE FOUND. MX FOUND FUEL PUMP FEED OVERHEAD CONTROL PANEL CENTER PUMP SWITCH GIVING OFF AN ODOR. PANEL REPLACED AS A PRECAUTION.