Technical Reverse light on motorhome kaput

[inputprocessor]

Hi my reversing light stopped working and my reversing/rear camera system which used to auto switch to close-up view when engaging the reversing gear stopped as well and stays in normal view,so I got the meter out and I got a reading of 11 volts so it should light up even dimly, new bulb contacts checked and working, vehicle ducato 2006 2.3 jtd x244. Any ideas are welcome, also any pictures of where the reverse light switch would be and where exactly I find the fuse for the reverse light would also be appreciated (not labeled in the book)

 

[Reg 65]

I don't know about the X2/44 but if its the same as the X2/50 there is no fuse where lights are supplied by the computer which cuts the power if the wattage is not what the computer thinks it should be. So a fuse would be superfluous. The computer might supply 11 volts to your meter then cut the power if it doesn't like what you have connected to it. I would try disconnecting the reverse camera and fit a bulb of the wattage recommended in the handbook.
(I have my reverse camera supplied by a separate switch so its not going off and on when I am shunting backwards and forwards into a tight parking space)

Edit: Sorry the above is not applicable to the X2/44 - see following post from Communicator

 

[Communicator]

I doubt it will be the fuse, as F31 also supplies the heater fan. I expect that you would miss that facility! I keep stating here and elsewhere that modern multimeters are so sensitive, that they can give a credible reading via a high resistance. A simple12V test lamp is perhaps a better indicator of a good connection.
From the few clues provided I assume that the vehicle is a coach built MH, which will have a converter installed junction box between the Fiat and converters wiring. Possible site for corrosion?

I recently suffered from a similar on my 2006 x244, which was due to the reversing light switch. The switch is on top of the gearbox, concealed and difficult to reach. It may be possible to reach it over the LH end of the box, but that would entail working blind.

My approach was to remove the air cleaner and associated air inlet pipes. However while the switch was then visible it was still partly obscured by the clutch slave cylinder mounting. The clutch operating rod is under considerable preload from an internal spring...........

Attached are eLearn diagram E2022, for the reversing lights, and my own LH Cab Fusebox diagram, which while customised is still applicable.

@Reg 65 . The x244 does not monitor the bulb current.

I am now required to venture on a shopping trip, but may be able to supply further advice later in the day.

 

[inputprocessor]

I doubt it will be the fuse, as F31 also supplies the heater fan. I expect that you would miss that facility! I keep stating here and elsewhere that modern multimeters are so sensitive, that they can give a credible reading via a high resistance. A simple12V test lamp is perhaps a better indicator of a good connection.
From the few clues provided I assume that the vehicle is a coach built MH, which will have a converter installed junction box between the Fiat and converters wiring. Possible site for corrosion?

I recently suffered from a similar on my 2006 x244, which was due to the reversing light switch. The switch is on top of the gearbox, concealed and difficult to reach. It may be possible to reach it over the LH end of the box, but that would entail working blind.

My approach was to remove the air cleaner and associated air inlet pipes. However while the switch was then visible it was still partly obscured by the clutch slave cylinder mounting. The clutch operating rod is under considerable preload from an internal spring...........

Attached are eLearn diagram E2022, for the reversing lights, and my own LH Cab Fusebox diagram, which while customised is still applicable.

@Reg 65 . The x244 does not monitor the bulb current.

I am now required to venture on a shopping trip, but may be able to supply further advice later in the day.

Thanks for that.
Just to clarify, you are saying that if I take out the air filter, mine being on the passenger side of the vehicle, I should be able to see the reverse gearbox switch. Can you please tell me what the reversing sensor unit is, and where it would be located? Also, I have only got one reverse light.I am limited with mobility issues and can't get under the vehicle, but apparently, the reverse switch is the one that does trigger the reverse close-up of the camera system and therefore is a common dominator and worse while investigating.
BTW you are thinking a multimeter reading of 11 might not be correct and that's why the bulb is not even dimly on?

 

[Communicator]

I did not have time over my breakfast to welcome you to the forum, so may I do it now? Welcome.

To be precise, on removing the air filter you should be able to see the reversing light switch connector. You may also be able to see the 22mm hexagonal top of the switch body.

Removing the air filter is not the easiest of operations, but I had removed it on two previous occasions to access both the fuel filter, and to bleed the clutch after replacing the clutch master cylinder.

Removing the air filter.

There are 4 off No 2 Pozidrive headed scews holding the air filter cover, the two at the rear are not the easiest to reach.
The air inlet hose needs to be removed. I unbolt at front over the radiator, and use "Clik" pliers on the air hose clamps. As I do not use the pliers frequently, I have to work out which way round to apply the pliers for each session. The air outlet hose, and smaller "blow by" hose also need removing. For ease of use, I use "Laser 4231" Hose Clamp Pliers. If attempting the task, you will realise why.

With air filter element squeezed out, there are 3 off washer faced M6 nuts (10mm spanner) in recesses at the base of the housing. These nuts may be rusted onto the rubber mountings below. My original cure was to remove the body plus mounting plate and separate, and fit stainless steel nuts.

With the air filter body removed, the reversing light switch is still tucked behind the rear vehicle LHS corner of the clutch slave cylinder mounting plate.

The "reversing sensor unit", or reversing light switch is a metal bodied, plunger operated switch, screwed into the top of the gearbox. For photo try searching Ebay for "Ducato x244 reversing light switch".

A modern multimeter reading 11V with a nominal 12V supply, suggests a very high resistance path.

When I eventually got my switch unplugged, I shorted the harness connector with a paper click, and switched the ignition on. Reversing lights illuminated, diagnosis confirmed.

There is still the possibility of a fault in the converters junction box, but that may be underneath the vehicle.

 

[inputprocessor]

I did not have time over my breakfast to welcome you to the forum, so may I do it now? Welcome.

To be precise, on removing the air filter you should be able to see the reversing light switch connector. You may also be able to see the 22mm hexagonal top of the switch body.

Removing the air filter is not the easiest of operations, but I had removed it on two previous occasions to access both the fuel filter, and to bleed the clutch after replacing the clutch master cylinder.

Removing the air filter.

There are 4 off No 2 Pozidrive headed scews holding the air filter cover, the two at the rear are not the easiest to reach.
The air inlet hose needs to be removed. I unbolt at front over the radiator, and use "Clik" pliers on the air hose clamps. As I do not use the pliers frequently, I have to work out which way round to apply the pliers for each session. The air outlet hose, and smaller "blow by" hose also need removing. For ease of use, I use "Laser 4231" Hose Clamp Pliers. If attempting the task, you will realise why.

With air filter element squeezed out, there are 3 off washer faced M6 nuts (10mm spanner) in recesses at the base of the housing. These nuts may be rusted onto the rubber mountings below. My original cure was to remove the body plus mounting plate and separate, and fit stainless steel nuts.

With the air filter body removed, the reversing light switch is still tucked behind the rear vehicle LHS corner of the clutch slave cylinder mounting plate.

The "reversing sensor unit", or reversing light switch is a metal bodied, plunger operated switch, screwed into the top of the gearbox. For photo try searching Ebay for "Ducato x244 reversing light switch".

A modern multimeter reading 11V with a nominal 12V supply, suggests a very high resistance path.

When I eventually got my switch unplugged, I shorted the harness connector with a paper click, and switched the ignition on. Reversing lights illuminated, diagnosis confirmed.

There is still the possibility of a fault in the converters junction box, but that may be underneath the vehicle.

Thanks Can you please tell me what the reversing sensor unit is mentioned in the diagram?

 

[Communicator]

Sorry, I had forgotten that the diagram is slightly customised. Tne sensor is the typical 4 x acoustic sensor unit purchased for I think, less than £10 on Ebay, and fitted to utilise the concealed existing openings on the rear bumper. Apart from running sounder cable to just behind driver's head, biggest problem was to top and tail the equal length sensor cables, to match the required lengths. However I did have to remove tha plastic rear bumper cover and corner sections, when cutting the sensor holes.

 

[inputprocessor]

Sorry, I had forgotten that the diagram is slightly customised. Tne sensor is the typical 4 x acoustic sensor unit purchased for I think, less than £10 on Ebay, and fitted to utilise the concealed existing openings on the rear bumper. Apart from running sounder cable to just behind driver's head, biggest problem was to top and tail the equal length sensor cables, to match the required lengths. However I did have to remove tha plastic rear bumper cover and corner sections, when cutting the sensor holes.

Thanks