I'd recently posted about my V70 surging when I turned on the blower fan. I took it to the local dealer shop and they discovered a vacume line wasn't connected. Great, so the that problem was fixed. Driving home I was enjoying my AC, car was fine until suddenly the Speedometer quit and mileage scree...

Hi, I just spent a good while trying to figure out how to change it and I'm baffled. Any tips on this. I'm a newbie and sure would appreciate it.

Sorry the motor of the car surges when the blower fan motor runs. It's so bad I have to really mash the break at stops and when I'm driving you really feel it. I am not running the blower fan until I can figure it out and this is very unhandy this time of year

I just switched out a 2000 V70 motor...it runs fine but when I turn on the blower it surges all the time...even when driving. I first thought "blower" but theres no noise. Its as though the system is overloaded. Any suggestions?