Hello I drive a 97s 2.5 Omega Caravan. I bought the car used. When I took the car I noticed that the TC and ABS lamp lit. Besides, the speedo didn’t go either. The battery was empty and we had to give start-up help. So I thought that might be because of the tension. After about half an hour on the highway the two warning lights went out and the speedo went out again, but only about 10 minutes. After that I finished. Next day I built d the battery of my sister (was a little one from the Astra with 40 Ah). On the first trip the speedometer went again until I turned off the car again. After that was over again. Now I got a new battery with 70 Ah, but unfortunately the speedometer still does not go and the two lamps shine again. I measured the rear ABS sensors, but they seem to be ok. I also cleaned the things roughly. But still the same sch …e. Today I have the error sp He spits out the following faeces: 49 power supply voltage high I then measured the voltage on the battery with a multimeter. However, the voltage does not exceed 14,15 V. Please ask for help