Quote:
Originally Posted by estorilx53
Well today i checked my alternator if it was Good or not. I started the car BMW x5 4.6is 2002 with 140,000 miles on it . Car the voltage on the cluster reads about 13.5 and the i took out the negative on the battery terminal while the car was on idle and the car stayed ON and i check the voltage while the batt neg (-) is not connected and it reads 13.5 still and i so the "trifecta" symbols SHM
Any idea why the "TRIFECTA" light was triggered ????
|
You're lucky you didn't blow something. You don't test the alternator that way anymore. That was old school long ago. That's a no no these days with computers and such. At least that's what my good friend/mechanic tells me.