My renault clio has an issue with the rear lights electrics. When I indicate left the fog light and the indicator light on the dash both flash and outside the brake light as well as the indicator is flashing. Same for the other side. Also when I press the brake pedal the fog light indicator goes on at the dash but not outside (the rear light go on as normal). Any ideas?

I have the similar problem with my 2000 model. On mine I have narrowed it down to the rear light cluster on the right as you look at it from the rear (drivers side in the UK). Here's how I fix mine, although it does keep happening every now and again:
Remove the lights cover from inside the boot, it is held in place by a couple of plastic nuts.
Remove the strip of lights that are clipped into place.
There is an electrical connector block attached to the now removed light cluster. Undo this and the whole set of lights will be free.
Where the connector block fits to the light cluster clean all of the terminals. I use one of my wifes nail emery boards.
Make sure the female connectors on the connector block are all fairly snug so when put back together it is a tight fit.
Clean with electrical contact cleaner if you have any (not really necessary but I had some anyway).
Reconnect the block and test your lights, put back together.
I suspect it is an earth fault but I ran a separate earth to the unit but it didn't improve.
Other faults I noticed is the rear wiper operates when the front one only is on and I touch the brakes. Also when I lock the car when the indicators flash to show it is locked the rear high level brake lights flash as well. I was thinking of trying another light cluster, but 25 pounds from a breakers yard seems a little steep for a minor irritation.

your UCH is failing can be repaired by electronic specialist or can be replaced

It sounds as though the ground connection(s) to the rear lamps are suspect - this would seem a sensible place to begin along with ensuring the correct bulbs are fitted and the bulbholders and any internal lamp connections are in good order.

It is also worth checking the wires that pass from the body to the tailgate for internal breaks. It will be necessary to pull back the rubber boot.

If all is found good the trip to the auto electrician is likely...

Try pulling the bulb and clean the socket may be shorting

You have a ground fault somewhere, check all the grounds for the lighting.

hi, this sounds like you have a bad earth at the rear lights, remove both rear light clusters and check for any signs of corrosion, give all connections a clean and a little tweek, this should cure your problem

Try this, make sure both bulbs are the same. Then try replacing both bulbs.Also go to fuse box usually in vehicle under glove box or steering column and change fuse for those lights.

hi mate my clio the same nothning 2 do with low beam as they still dont *** on , did you solve the problem?

hiya put your headlights on and ignition then rear foglight/s they should now operate rear and front fogs usually only operate with head dipped lights on ? this is designed

So thankful for this site and the answer to the problem, which was infact the black connectors under the passenger side well..Cheers again i've saved myself £100's x