Check all the grounds. There are engine grounds that sometimes come loose. I think there is one from the engine to the firewall that comes off sometimes. Bottom line is the alternators are probably fine but without a complete circuit it just wont charge.
P.S. If the grounds are just dirty clean them and check for tightness that could explane the sometimes it works sometimes it don't thing.
Alternator not charging battery due to a bad fusable link?
check starter
That would indicate that the alternator is not functioning.
The tracker must be removed from the wristband The tracker is inserted into the charging cable The charging cable is inserted into a UL-certified wall outlet or a USB port on a computer The LED lights will pulse every few seconds will shows your level of battery charge
with tools.
check your battery. if your battery is Ok have your alternator and starter checked at a local Autozone or similar store
12 volt
The alternator is failing.
Internal
It could be the battery, or it could be the alternator! I had this problem with 2 vehicles I had! It will keep trying to turn over, but, if the alternator is bad, it will just keep draining the juice from your battery.Have a mechanic check how many amps the alternator is putting out. If weak it needs to be replaced. Loren J.
the minimum gap is 0.039", I just changed the sparkplugs of my Tracker ___________________________________ On my 98 tracker the specs are on the inside of the hood, have you checked there?
The alternator, facing the engine, is located low on the left side of the engine. It really is easier to remove and replace from the bottom.