Originally Posted by longspoon

At present we have ABS, BAS/ESP, brake warning, brake wear indicator, and rear spoiler flashing lights. Very illuminating but not funny. Also speedometer has stopped working but rev counter and other instruments are all fine. Heavy duty battery is new and fully charged. I fitted new discs and pads and a year ago. I have re-soldered suspect terminals in RCM and cleaned speed sensor rings on rear hubs. The sensor wires are sheathed in rubber at the wheel end and well enclosed at the under body end so nothing to wear or corrode there, by the way, why should these ever need replacing assuming they are undamaged? Main ground points have been checked cleaned and no rust. Brake stop light switch checked aok. I have read as many threads as I can find but can not find anything else to try that makes sense. The rear spoiler becoming u.s. happened first which I can live with, the other items all happened at the same time which would suggest a single electrical fault somewhere. The car drives well and has no adverse brake problems. There are no fault codes showing on my diagnostic device. Any reasonable suggestions would be greatly appreciated.