K ENWORTH T680 MIRRORS - SERVICE MANUAL 6.2. OAT SENSOR REPLACEMENT The OAT sensor is located on the Left Hand Mirror (driver side). Before replacing the sensor, check if it is faulty. Remove the mirror and test the resistance with an ohmmeter between terminals 5 & 6 on the connector. See the table below to compare the reading against actual temperatures. Replacement OAT Sensor Butt Splice Procedure: 1. Remove the mirror system from the truck (see 1), carrier glass assemblies (see 2) and the housing (see 3) from the mirror. 2. Remove the faulty OAT sensor by cutting the green and blue wires approximately 1/4” before the sensor and appropriately dispose the faulty OAT sensor. 3.
Strip the ends of the wires on the remaining cable approximately 3/8" from the cut. 4. Use butt splice supplied and slide over one of the wires. 5. Separate the wire strands in a way that the wires fray as shown in the figure below. 6. Push the two wires (new OAT sensor & remaining cable) together to intertwine the two wire strands. 7. Slide the butt splice over the combined wires and center it. Copyright © Lang Mekra North America 2014 Page 12 of 28 Revised:
03/2014 Temp deg C (deg F) Min Resistance (kOhms) Nom Resistance (kOhms) Max Resistance (kOhms) -10 (13.8) 52.8 55.3 58.0 -5 (22.9) 40.5 42.3 44.2 0 (32.0) 31.3 32.7 34.0 5 (41.1) 24.4 25.4 26.4 10 (50.2) 19.2 19.9 20.6 15 (59.3) 15.2 15.7 16.3 20 (68.4) 12.1 12.5 12.9 25 (77.5) 9.7 10.0 10.3 30 (86.5) 7.8 8.1 8.3