If so, the reverse switch is ok. You will need to find where the extra lights are tapped in to, most likely at the o/e reverse lights or rear loom. There will probably be an aftermarket fuse and possibly relay as well. They may be supplied from your house battery, check for extra fuses here. F.
Fiat Ducato Year 2004 2.8 JTD engine Doe's anybody know where to locate the reversing light switch on the above model. the location of the reverse switch & the Fuse 13. Heater. Additional heater. 25.0 A. Fuse and relay location. Fuse box diagram. Cigarette lighter fuse. Assignment of the fuses and relay Fiat Ducato 1994-2002. SzX0GhR.