What was found
ACFT DIVERTED, DURING CLIMB OUT, PASSING THROUGH 26K, A STRONG ACRID ODOR BECAME APPARENT IN THE COCKPIT. FLIGHT ATTENDANTS REPORTED SAME ODOR IN CABIN. BEGAN DESCENT DIVERSION. AFTER APPROXIMATELY 1-1.5 MINUTES BOTH OIL TEMP HIGH LIGHTS ILLUMINATED. THROTTLES WERE AT IDLE. PERFORMED QRH PROCEDURES AND LIGHTS EXTINGUISHED AND ODOR DISSIPATED. UNEVENTFUL LANDING. MAINTENANCE PERFORMED WC2120-2367 AND 2120-2368, FOUND CHAFED & BARE WIRE P70A10 FOR BUSS OUT, EMERGENCY LIGHT DC & AC TO CIRCUIT BREAKER C19 AND C21 WITH BROKEN STRANDS AND BURN MARKS. THE WIRE WAS REPLACED IAW WSPM 20-20-10. THE AIRCRAFT WAS RETURNED TO SERVICE.