198001761 - I016 CENTRE BRAKE LIGHT (THIRD BRAKE LIGHT) NOT WORKING

The middle third brake light does not work when the brake pedal is pressed with the key ON. Even the side brake lights are also not working,    See table I015 (SIDE) BRAKE LIGHTS NOT WORKING
1INDIVIDUAL BULB CHECKAll OKProblems encounteredOperation
Check the condition of the individual bulbs and bulb holder assemblyMove on to Step 2Bulbs damagedChange the bulbs    Op. 5550D17 THIRD BRAKE LIGHT BULB(S) - R.R
2All OKProblems encounteredOperation
connections between junction unit and bulb; bulb earth    See E2021 BRAKE LIGHTS Move on to Step 3Connections between dashboard junction unit and brake lights brokenRestore the correct connections
Earth defectiveRepair the earth contact correctly