Originally Posted by RichardV6
Originally Posted by Mark+4
Hi,

The Speedometer receives the data for all 4 gauges and then passes it along to the others. I took a picture that shows the connection on to the Rev counter which then passes it to the fuel and Temp Gauges, which are out of shot.

The Speedometer is on the left of the picture with the yellow connector which receives the signals, the other connector with 3 wires out goes to the Rev counter that has 3 in and 3 out which go to the Fuel and then Temp.

[Linked Image]

Hope this helps.

Can I assume engine fuse 3 and its 12 volt feed out to instruments on purple/red wire has been thoroughly checked?

Assuming it has, without VDO instrument info it's difficult to be sure but all instruments affected by your fault are driven by CANBUS data. Thoughts then are that the Speedo receiveing this data first is just a means of daisy chaining and data passed on isn't processed by same. Poor connections aside I wonder therefore if its worth unplugging each instrument by way of testing thinking

So 1st thing is the dealer confirmed availability from the factory yesterday and due to our impending 18 night trip to Spain, I told them to get one sent out. This started Sept. 2023 and I've got to the stage where I'm prepared to just throw some money at it.

Hi Richard, I did check the fuse, actually took the opportunity to clean all of them, can't say the connection has been thoroughly tested ( not sure what that would entail ) but continuity is fine, when tested.

Due to the intermittent nature, doing anything 1 dial at a time isn't feasible and I'm not convinced it would be worth it. Example is our last trip that confirmed all the cleaning hadn't worked. During a 2 day trip with an overnight in Harrogate, the 1st day showed no sign of the issue, the next day we went over to York via The Motorist, the issue only reoccurred on the way home from York. Also over time the issue has changed slightly, it starts with all 4 dials dying at the same time but we have also observed some individual dials dying or groups such as fuel and temp. NB. All observations are while driving and the dials recover usually within seconds but sometimes a few minutes.

I don't expect to have enough running to confirm a fix until we are well into our trip, I won't be convinced it's gone for a while after that and I'm not convinced the Speedometer will fix it. The only other thing I can think of is the ECU and/or the CAN/BUS signals.

Mark
2015 +4 Ferrari Le Mans Blue