What was found
STARTED BOTH ENGINES, COCKPIT FLOOD LIGHTS ON. READY TO TAXI. COCKPIT FLOOD LIGHTS GO OUT ON THEIR OWN, STRONG ELECTRICAL BURNING ODOR IN COCKPIT. SHUT AIRCRAFT DOWN ASAP AND UNPLUGGED BATERIES. LOCATED AT KAPA-DID NOT DEPART AIRPORT. VERIFIED SQUAWK. REMOVED HEADLINER INSPECTED WIRES & BULBS REPLACED BOTH FLOOD LIGHT BULBS, FOUND INSULATION MAKING CONTACT WITH BULB, INSTALLED A HEATSHIELD, REPOSITIONED INSULATION AROUND FLOOD LIGHTS, REASSEMBLED HEADLINER, RAN FOR 1 HOUR WITH NO DEFECTS NOTED IAW CESSNA 750 IMM 25-10-12.