TM 10-3930-669-20 6.  ENGINE OVERHEATS (ENGINE OIL TEMPERATURE OVER 250°F [121°C]) (CONT). KNOWN INFO Engine oil level OK. Engine oil temperature is over 250°. Engine oil temperature sensor OK. Engine oil temperature gauge OK. Gauge wire 5 OK. Gauge ground wire OK. Wire 19 faulty. Cylinder head fins and air outlet frame OK. Oil cooler fins OK. Oil cooler OK. POSSIBLE PROBLEMS TEST OPTIONS Verify repair. REASON FOR QUESTION If engine does not overheat, fault has been corrected. 2-90