Something is draining the battery but everything is testing fine i must be missing something
Usually that fuse powers the alternator and the fuse box.
It would have to be a big short to ground to blow that fuse.
Its possible the main wire to the alternator is touching a metal spot, or the alternator is shorting out inside when it is running.
What is draining the battery may be something else, or the battery could be discharging after the fuse blows if the alternator is not charging it.
Every time I put my alternator fuse on my 1997 Lexus es300 it keeps blowing right away
SOURCE: New battery and alternator - still won't charge
try the battery connectors if you haven't already... sometimes replacing these is all that is needed to get the charge back.
If not.. check out a new starter.
SOURCE: 2002 galant. bad/broken positive battery cable.
my 120 amp blew on my mitsubishi 01 galant. What do I do
SOURCE: My 1997 Mitsubishi Galant won't start. Initially
You have short circuit between battery positive terminal and chassis.Follow a cable from battery to an alternator.If O.K. remove alternator and check all diods- 6 pse.Also check cable from battery to a starter motor.
Testimonial: "Thank you very much for your help. The problem has been fixed."
Check the lines of the alternator sometimes it gets corrosives
Check the tension on the drive belt, bearings, brushes...
Take the current alternator and test it with the new one and check the voltage in the store where you purchased.
check for shorts.
check that gets enough ground.
Also, just because its new does not mean its good special if it's refurbished that I don't know where you purchase it.
I remember a time that I replaced my refurbish steering power pump 6 times. pump was defected took me 6 times. it could be the Alternator regulator to be faulty.
how you can tell if your alternator is faulty. the lights on inside your car will blink go off, when you change station on your radio go off and on, dim, fuses blowing, head lights bulb blowing... check it out.
Test the alternator both the one you have now and a new one,
get second opinion to another place.
If is refurbished and keeps dying try to get the genuine for your car.
Good luck
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