Hobson2

Hi DKBoy, Unfortunately everything I tried failed to reveal the answer. Eventually I decided to try a local auto-electrics garage who located the fault to a break of the wire conductor in a cable showing no signs of ware to the insulation . Not sure of the actual position of the break but they successfully replaced the damaged length of cable. I found it very difficult to locate the path of the cable from light to a power sauce connection from where I could start continuity tests hence the trip to the garage. I did manage to remove the high level light and test it on the bench : it was OK as I thought it would be. Sorry I can't be of more assistance.

Thanks for your time and knowledge. I'll try a different tack with earth and then possibly the alternate route. I'll report any progress. Thanks again.

Well Pete, it looks like a trip to an Auto Electrical Repair unit. I have checked all the fuses in both the one inside the car and the one in the engine bay. All the fuses checked OK using an Avo.. I don't understand why the high level brake light is on a different circuit to the rear brake lights which incidentally are working fine. i have considered breaking into the nearside brake light and running a new cable. Having just written that I have had a thought, the two wires that connect to the light, is one power and one earth? if so then power could be good and earth is at fault. I wonder!!

Thanks for your reply and advise. I will take appropriate action . In hindsight No 1 fuse is rated 40 which does sound a little high for parking and one brake light. The light is fitted in the tailgate and at point of entry the loom is well bound with no signs of chaffing or damage. Apologies for being in the wrong place.

The high level brake light on my 2017 Fabia Estate stopped working. A warning light signalled "check third braking light". Thinking that led lights don't normally fail I assumed it would be a power supply issue. From the fuse table in the handbook (page164) I identified No 1 fuse for parking lights and high level brake light. As the parking lights are operating correctly No.1 fuse must be sound. I removed the default brake light and confirmed no power to the light. The light proved correct with an alternative power supply. So my dilemma is, where has the power supply failed? The wires visible, having removed the light, are in good condition as is the wiring loom as a whole. Any ideas greatly received.