		Test results
1	REVERSING SWITCH CHECK	All OK	Problems encountered	Operation
	Check that the reversing lights control switch is working correctly	Move on to Step 2	Switch with defective contact	Replace the switch
2	CHECK ON OPERATION OF FUSE AND RELAY	All OK	Problems encountered	Operation
	Check the operation of relay T6 and fuse F59 in the engine compartment junction unit	Move on to Step 3	1. Relay defective 2. Fuse blown	1. Replace the relay 2. Replace the fuse (and find out what could have caused it to blow)
3	ELECTRICAL SYSTEM CHECK	All OK	Problems encountered	Operation
	Check the continuity and the insulation of the wiring between the reversing switch and the reversing light	Move on to Step 4	Wiring with short circuit or open circuit	Restore the correct wiring
4	CHECK ON OPERATION OF BULB	All OK	Problems encountered	Operation
	Check that the reversing light bulb is working	Move on to Step 5	Bulb defective	Replace the reversing light bulb Op. 5550D26 REVERSING LIGHT BULB - R.R.
5	BODY COMPUTER CONNECTIONS CHECK	All OK	Problems encountered	Operation
	Check for deformed terminals or connections not present at the Body Computer	Move on to Step 6	Missing connections / pins bent	Restore the correct connections
6	CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the fault is no longer present	End of diagnosis	The fault persists	Replace the Body Computer Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R.

The reversing lights are controlled directly by the switch on the transmission connected to the positive line.