2004 X5, 3.0i
I replaced my defunct aux. coolant pump with a new one. Everything was fine on the first day after this replacement. However on the 2nd day, the pump was no longer functioning. I pulled out the electrical connector and connected the pump to an external battery, the pump ran perfectly.
I tested the connector, with ignition, engine off & cold, and fan blowing, I got 3v and 12v on the multimeter intermittently. I don't know whether it's what's supposed to be or the meter is faulty. What went wrong all of a sudden?
Any guidance would be much appreciated.
Thanks,