323000782 - K006 TRIP METER DOES NOT ZERO

With the key on, the trip meter does not zero when the TRIP button on the right steering column switch unit lever is operated.
1CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
Connect the Examiner diagnostic equipment to the diagnostic socket.Check that there are no faults in the instrument panel.Move on to Step 2Presence of errors.Continue following the instructions for the diagnostic equipment.
2ELECTRICAL CIRCUIT CHECKAll OKProblems encounteredOperation
Check:- Connections between right steering column switch unit lever and instrument panel;- Connections between right steering column switch unit lever and earth    See E4010 INSTRUMENT PANEL Move on to Step 3Connections defective, earth or power supply defectiveRestore the correct connections, if necessary, replace the wiring.
3STEERING COLUMN SWITCH UNIT CHECKAll OKProblems encounteredOperation
Check that the TRIP button the right steering column switch unit lever is working properly    See E4010 INSTRUMENT PANEL End of diagnosis.Right lever defective.Replace the steering column switch unit    Op. 5550A10 STALK UNIT ASSEMBLY - R+R