I own a 1995 850GLT Auto estate 2.5 petrol. Ocassionaly when starting the car the ABS warning light stays on whilst the engine is running. The problem is that none of the lights on the vehicle work during this time. Indicators, headlights etc. If I switch the car on and off again a few times the light goes out and everything functions correctly again. It apears to be happening more frequently. The light never appears when the car is in motion(unless driven whilst already on at start up) only at start up and not every time the car is started. Any ideas please.