Re: Alternator gets hot with engine off
Unbelievable! I thought that I was done with this adventure.
Last week, I noticed that the alternator light would briefly come on with engine speeds above 3500 RPM. Since I rarely hit that speed and never drive at it (except maybe during a "spirited" acceleration up an on-ramp), I wasn't about to panic. Temporary high speed failures of an alternator indicate excessivly worn brushes - the brushes lift off the rotor at high speed because the fully extended brush springs lack the strength to hold them in place. I put it on my "get around to it" list and carried on.
Anyway, a couple days ago the inevitable happened - the light blinked on and stayed on... my 2nd replacement alternator had just koofered. After replacing 3 alternators in as many weeks, I was like a one man NASCAR pit crew - I had the old one out, drove it to NAPA for yet another exchange and the "new" one in and running all inside 40 minutes. I measured the output - at as high a speed as I would dare - and it appears to be OK (but then so did #2).
The good news is that all these alternators are not costing me anything but my time... but what a pain in the a$$ to have to keep swaping them out.
Third time lucky?
2006 Ranger Sport 5 spd 3.0L
2010 Fusion SEL 3.0L