My stype 2.7 diesel auto on an 04 plate has developed an electrical fault.

Yesterday a fault light appeared in dash to say my rear park/stop light on the rhs was faulty.

I replaced bulb.

no change, the warning light still there,

I got my son to press brake pedal whilst I looked at rear lights.

The lhs  light cluster worked normally but the rhs side reacted with brake light bulb not working at all and other lights on that side either not working or working when they shouldn't. the high level brake light just gave an occasional small flicker. 

I replaced the brake light bulb on rhs with 3 different bulbs.

 

Ideas for repair gratefully received.

Are you confident that the lamps are actually blown/gone i.e is there a break in the filament? It sounds very much like an earth/ground fault to me

Was the bulb warning system standard please?

I have had the bulb failure message three times in two years, twice on my holiday in Ireland.

 

Replacement is easy which cures the message.

 

Peter.

chaged bulb. fault till there. With the exception of the fault warning on dash doesn't illuminate . but the other effects such as the flickering high level brake light  and the bulbs not working correctly on rhs still there

If it is an earth /ground fault where would I look for cause ?

Have run an earth from back of lights to body of car .This doesn't cure problem. the high level brake light still flashes and brake light doesn't work. Though one of lights does become a bit brighter.

Certainly sounds like an electrical short somewhere.  I'd check the wiring as far as you can see it, looking for any signs of damage to the insulation, especially where it passes through metal bodywork.  Also could be caused by water in the  wiring or connectors shorting out.   If this doesn't find the culprit you probably need to get an auto electrician to check it for you.