Rob57

On 11/25/2023 at 6:21 PM, Steve Q said:

I'd definitely recommend changing the switch. 

Replaced the switch today, cleared fault codes and all good. Switch must fail safe and put lights on? Cheers

Just thought I would update on diagnosis and repair. Fault was brake lights on all the time (ignition on) and glow plug light on dash flashing. Scan fault codes identified Brake Light/Cruise control circuit A.  Just replaced brake light switch using Audi genuine part £21 and cleared all fault codes. Can get cheaper pattern part but felt worth using Audi part.

Fault cured and glow plug light working as normal. 

A6 Avant 2007 2.0 diesel

Hi, My avant has just illuminated the glow plug light (flashing on/off). My scanner suggests it is a fault with the brake light switch/circuit. The brake lights are on all the time (ignition switched on) and with switch disconnected. Any known wiring fault suggestions would be grateful. Also looking for a wiring diagram.

Thanks