Electrical equipment and instruments of motorcycle Ducati ST2 (1997-2003)

Removing the horn and disconnecting left-hand side electrical connections
Disconnect the horn from the main cable. Unscrew the screw (1) and remove the horn together with its support from the head cover. Disconnect the engine sensor connector (2). Disconnect the head water temperature sensors. Remove the alternator...

Disconnecting the righthand side electrical connections
Unscrew the clamp screw and disconnect the earth cable (5) from the engine. At reassembly, spread a coating of grease for electrical contacts on the earth cable fitting. Remove the cable tie (A) and disconnect the neutral indicator light (6)...

Electrical diagrams of motorcycle
Wiring diagram legend 1) Right-hand handlebar switch 2) Key switch 3) Ignition relay 4) Fuse box 5) Indicator flasher 6) Light relay 7) Starter motor 8) Starter contactor 9) Battery 10) Water temperature sensor 11) Fan relay 12) Electric fan 13)...

Fuses — checking and replacement
The main fuse box is located on the left-hand side of the frame, behind the headlight. To gain access to the fuse box, remove the instrument panel left side cover. To access the fuses, open the fuse box cover (A). Fuse layout and amperage are shown...

Remove spark plugs
Remove each spark plug cap and unscrew the spark plug from the cylinder head. Make sure that no dirt or other objects can fall into the combustion chamber. Check the color of the ceramic insulator of the center electrode. A uniform light brown color...

Checking the components of handlebar switch
Left handlebar switch In the event of a fault, the internal connections of the switch must be checked in all the operating positions of the switch. To do this, disconnect the main cable connector and use a tester set at the + position on the...

Checking the components of key switch
Disconnect the main cable connector of the key switch and, using a tester, check the internal switch connections as follows: Turn the ignition key to the OFF position and check that the tester goes to the end of the scale range across points (1) and...

Checking the components of electric fan and lights relay
Remove the relay from its base and apply a voltage of 12V (battery) across contacts (86) and (85): you must hear the click indicating that the electromagnet inside the relay is working. Connect a tester across contacts (30) and (87) and check that...

Front and rear STOP light switches, neutral gear switch and oil pressure transmitter
Although these components look different, they operate in the same way. To check that they are in good working order, remove them from their housing and, with a tester connected across the connector terminals, check for the following conditions:...

Changing light bulbs
Headlight Once you have identified the bulb to be changed, remove the corresponding side cover of the instrument panel. To reach the headlight bulbs, proceed as follows: Note. To facilitate this operation, undo the screw (1) that attaches the...

Adjusting the headlight beam
The motorcycle must be perfectly upright with the tyres inflated to the correct pressure and with a rider seated. Position the motorcycle 10 metres/32.8 ft. from a wall or flat surface. On the wall or surface, draw a horizontal line at the same...

Arrangement of wiring on the frame
Cable and wiring paths have been optimised to ensure the minimum obstruction. Each path section is designed to prevent interference with parts that might damage the wires or cause operating faults when the motorcycle is used. The diagrams on the...