Intermittent Speedometer Failure

[squeasel]

Greetings All! I am looking for advice on the next item to check.

First, the speedometer fails and DSC, ABS and Brake warning lights are solid yellow. This is an intermittent issue that seems not to happen in the morning but does happen in the afternoon. The car is a 2003 3.0L LHD. I found no fault codes though I have just a run of the mill OBDII scanner.

I thought that the left rear wheel speed sensor might be causing trouble so I swapped rear sensors with no change to the symptoms (note: it is my understanding that the speedo is given data by the left rear sensor).

Oddly, when the speedometer is not working, the cruise control will continue to function.

Any advice on what to check next?

Thanks in advance.