194003971 - 5540BL BIDIRECTIONAL SERIAL LINE CHECK

STEPCHECK TO BE PERFORMEDRESOLUTION IF THE CHECK IS NOT OK
1Disconnect the wiring of the master headlamp 14-way connector.Disconnect the wiring of the slave headlamp 14-way connector.Connect the diagnostic tester in ohmmeter mode and check the continuity between Pin 12 of the headlamp vehicle side wiring 14-way connector    See F010 LEFT HEADLAMPand Pin 12 of the headlamp vehicle wiring 14-way connector    See F011 RIGHT HEADLAMPRestore wiring continuity    See E2011 DIPPED HEADLAMPS
2With the headlamp 14-way connectors disconnected, check the insulation to earth by connecting across Pin 12 of each of the connectors and EarthRestore insulation    See E2011 DIPPED HEADLAMPS
3Check the continuity across Pin 12 of the headlamp 14 way connector    See F010 LEFT HEADLAMPand Pin 14 of the 21-way connector for connection to the Ballast control unitReplace the Master headlamp    Op. 5540B81 LEFT GAS DISCHARGE LIGHT CLUSTER - R.R.
4Check the continuity across Pin 12 of the headlamp 14 way connector    See F011 RIGHT HEADLAMPand Pin 14 of the 21-way connector for connection to the Ballast control unitReplace the slave headlamp    Op. 5540B82 RIGHT GAS DISCHARGE LIGHT CLUSTER - R.R.