[Stefan_H]

On our 206 (year 2006) sometimes suddenly all meters dies and goes to zero (Speed, tachometer, temperature and fuel), but the indicators and odometer still work.
After a while they start working again.
A strange thing is that when the meters have died sometimes they start working again if we adjust the fan speed of the climate control !

I have trid to check cables and connectors but cant find any faults. I guess that there is no problem with power or ground to the instrument cluster since the indicators and odometer always work. I suspect that ihe fault is in the cluster itself.

Any suggestions about what I could check more?

 

[davehg]

intermittent faults are often the cables/connectors. Have you actually disconnected, checked and cleaned the appropriate connectors?

 

[Stefan_H]

I have taken out the instrument cluster (twice actually ) and sprayed contact cleaner on the connector and socket, also the connectors and sockets on the ECU.
While the instrument are working, I have wiggled all cabels and connectors that I could reach without replicating the fault.
I have also checked, what I think, the grounding point at the door sill, for the cluster.

(Sorry for bad english...)

 

[davehg]

You've done the obvious checks. Is the battery in good condition with good clean contacts. Are the relevant fuse connections ok?

 

[davehg]

Could it be a fault in a different ignition controlled circuit? How about removing fuses one at a time eg the fan one?

 

[Stefan_H]

I have tried with a (almost) new battery but with the same result.
Good idea about other circuits, the fan and radio is on the same fuse as the cluster if I remember correctly. I will check if I can disconnect the fan and try again. As I wrote, if the meters are dead and I change the speed of the fan, the meters often start working again, so there could be a connection.
I have tried without the radio with no luck.

 

[davehg]

Although you have checked, could the instruments be using the earth from the fan when their own earth goes faulty?

 

[Stefan_H]

My daughter is having the car so I cant do any more testing until the weekend, but I will check the earth again more thoroughly.
Strange though that the indicators, lights and the odometer on the cluster always work, if there was a earth problem I assume that they also should die, but earth problem can be tricky.
Thanks for the help.

 

[davehg]

I may be wrong but some components earth through the ecu I think.

 

[windy1603]

Check down in the drivers foot well behind the kick plate as there is an earth point there which is known to cause issues with dash

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