Fiat 500 1.3 Multijet – REAR FOG LAMPS – – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

WIRING DIAGRAM - REAR FOG LAMPS - Fiat 500 1.3 Multijet

REAR FOG LAMPS - WIRING DIAGRAM Fiat 500 1.3 Multijet

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COMPONENTS - REAR FOG LAMPS - Fiat 500 1.3 Multijet

Component Code	Description	Reference to the operation
A001	BATTERY
B001	JUNCTION UNIT
C015	DASHBOARD EARTH, DRIVER'S SIDE	-
C030	LEFT REAR EARTH	-
E050	INSTRUMENT PANEL
F030	LEFT REAR LIGHT CLUSTER
H001	IGNITION SWITCH
H090	SWITCH CONTROL PANEL
M001	BODY COMPUTER

COMPONENT LOCATION - REAR FOG LAMPS - Fiat 500 1.3 Multijet

REAR FOG LIGHTS - COMPONENT LOCATION Fiat 500 1.3 Multijet

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Component Code	Description	Reference to the operation
A001	BATTERY
B001	JUNCTION UNIT
C015	DASHBOARD EARTH, DRIVER'S SIDE	-
C030	LEFT REAR EARTH	-
E050	INSTRUMENT PANEL
F030	LEFT REAR LIGHT CLUSTER
H001	IGNITION SWITCH
H090	SWITCH CONTROL PANEL
M001	BODY COMPUTER

DESCRIPTION - REAR FOG LAMPS - Fiat 500 1.3 Multijet

The vehicle is equipped with an extra-bright red rear fog lamp located in the left light cluster.The rear fog lamp is activated via the special button in the controls in the dashboard; when the lights are on, the warning light in the instrument panel comes on.The switching on of the rear fog lamp is managed by the Body Computer; it is activated by:ignition ON enablement signal (INT);dipped headlights on signal;control signal coming from the dedicated button (depending on the trim level, one press or two).Pressing the button once only activates the rear fog lamp on versions which do not have fog lights. Pressing it the next time switches it off.If fog lights are fitted, on the other hand, the button described has a dual function:the first time it is pressed, the fog lights are activated;the second time it is pressed, the rear fog lamp is also activated;the third time it is pressed, both lights are deactivated.If the dipped headlights are switched off, the rear fog lamp is automatically disabled even if the button has been activated. When the dipped headlights are switched on again, the rear fog lamp does not come on automatically, but only when the button is pressed again.If the key is switched off (OFF position) and then switched back to the MAR (ON) position M, the button must be activated again to turn on the fog lights.The correct operation of the side light is controlled by the rear fog lamp check function activated by the Body Computer and the following are monitored:open circuit (bulb missing or wiring interrupted);closed circuit to earth (bulb s.c. or wiring s.c. to earth);short circuit to battery voltage (wiring short circuited to Vbatt).When one of the situations described above is ascertained, the Body Computer makes the failure status available to the CAN: a special "general failure" warning light comes on in the instrument panel and, at the same time, the information is shown in the display.

FUNCTIONAL DESCRIPTION - REAR FOG LAMPS - Fiat 500 1.3 Multijet

The rear fog lamp button, located in the switch control unit H090, receives a reference earth from pin 37 of connector D of the Body Computer M001 and sends the engagement signal for the function to pin 45 of the same connector.The Body Computer M001 receives a direct battery power supply (pin 1 of connector A) protected by fuse F01 of the engine compartment junction unit B001 (pin 18 of connector B); it also receives an ignition-controlled power supply (INT) at pin 11 of connector E.The Body Computer M001 is also connected to the driver''s dashboard earth C015 via pins 9 and 10 of connector E.The main-beam headlights activation signal is sent to pin 38 of connector D of the Body Computer M001 from the steering column switch unit H005.The Body Computer M001 controls the supply for the rear fog lamp in the left rear light cluster F030 (pin 2) from pin 10 of connector F.The left rear light cluster F030 (pin 3) is connected to the left rear earth C030.Via the B-CAN line, the Body Computer M001 (pins 18 and 20 of connector D) is connected to the instrument panel E050 (pins 5 and 6) to manage the "rear fog lights on" warning light and the general failure warning light and the message in the display if there is a failure detected in the circuit.