Locate the fuse box. It is usually a black plastic box located near the battery.
2. Remove the cover of the fuse box.
Locate the flasher unit. It is usually a small, black box with a green or orange connector on top.
3. Disconnect the flasher unit from the connector.
Press down on the connector and pull it out of the flasher unit.
4. Remove the flasher unit from the fuse box.
Pry it out with a screwdriver.
5. Replace the flasher unit with a new one.
Push the new flasher unit into the hole until it snaps into place.
6. Connect the flasher unit to the connector.
Plug in the connector into the flasher unit until it clicks.
7. Close the cover of the fuse box.
8. Close the hood of your Fiat Ducato.
Test the turn signals to make sure they are working properly.
