198001841 - K066 HANDBRAKE WARNING LIGHT DOES NOT COME ON (WITH HANDBRAKE APPLIED)

The command to switch on the handbrake warning light is sent by the switch on the lever to the Body Computer Node which makes it available on the B-CAN to the Instrument Panel Node.
TEST RESULTS
0PRELIMINARY CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check that the warning light comes on during the check when the panel is switched onMove on to Step 2The warning light does not come on.Move on to Step 1
1CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
Connect the Examiner diagnostic equipment and check at the Instrument Panel Node that the handbrake warning light is working through active diagnosisMove on to Step 2The warning light does not come on / go out on command.Replace the instrument panel    Op. 5560B10 CONTROL PANEL - R+R
2ELECTRICAL SYSTEM CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the following, in order:- the continuity of the wiring between the handbrake lever switch and the Body Computer;    See E4010 INSTRUMENT PANEL - the continuity of the wiring between the Body Computer and the Instrument Panel.    See E4010 INSTRUMENT PANEL Move on to Step 31. Wiring broken.2. Wiring broken.1. Restore correct wiring    See E4010 INSTRUMENT PANEL 2. Restore correct wiring    See E4010 INSTRUMENT PANEL
3BRAKE FLUID LEVEL SIGNALLING SWITCH CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the operation of the switch and the connection between the switch and the Body Computer in order    See E4010 INSTRUMENT PANEL Move on to Step 41. Switch defective.2. Wiring broken.1. Replace the switch    Op. 3330C30 BRAKE FLUID RESERVOIR - R + R AND WASH INSIDE 2. Restore correct wiring    See E4010 INSTRUMENT PANEL
4HANDBRAKE SWITCH CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Switch operation checkMove on to Step 5Switch defectiveReplace the switch    Op. 3380A10 HANDBRAKE LEVER - R+R
5CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
Connect the diagnostic equipment to the Body Computer and check the plausibility of the parameter.End of diagnosisParameter not plausible.Replace Body Computer    Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R.