What was found
LEFT WING BODY OVERHEAT LIGHT ILLUMINATED AND WOULD NOT EXTINGUISH IAW QRH. NO PASSENGER CABIN SMELL OR SMOKE INDICATIONS. AFTER DIVERT SMELL LIKE A DUSTY FURNACE ROWS 18ABC AND AFT. ACFT GROUNDED. DIVERSION TIME-43 MINUTES. PERFORMED OVERHEAT DETECTION MODULE BITE TEST FOUND FAULT NR 10 AND NR 14. 26-18-201AMM. PERFORMED FIM TASK 26-801, CLEARED FAULT AND ALARM CODES, LT WING BODY OVERHEAT EXTINGUISHED. PERFORMED FIM TASK 26-802, WITH BREAKOUT BOX VOLTAGE AT PIN 4 AND PIN 12 5.8 VOLTS, ABOVE THE REQUIRED 5.1 VOLTS. RAN ENGINE AND VOLTAGE STILL GOOD. LEAK CHECKED BOTH AC PACKS AND LT L/E DUCTS, NO LEAKS NOTED.