I often get a Brake Light Fail message when I put the brakes on. I have tracked the fault to the plug and socket of the left rear light cluster.
In chronological order I have done this:
- The resistance of the left cluster to earth was 6.5 ohms. The right cluster was 0.0 ohms as it should be.
- I sanded the contacts with 2000 grit emery and sprayed it with circuit board cleaner. Result was 0.0 ohms and no messages
- Next day the messages appeared again. Sprayed with CRC. Resistance now 8.4 ohms.
- Cleaned it all again with circuit board cleaner. Resistance now 6.5 ohms.
5.Do I give up and run my own wire from the cluster earth to somewhere on the body? The problem is definitely that plug and socket.