2007 Toyota Corolla Alternator fuse blown

VIKISAHA

MEMBER
2007 TOYOTA COROLLA
1.8L
4 CYL
FWD
MANUAL
15 MILES

In my corolla, the alternator fuse blown repeatedly even after replacing it two times. The alternator fuse ia 100 amps, since it blown electronic devices not working. Only headlights, horn and parking lights works. Alternator doesn't charge the battery and this cause draining and weakens battery. Please suggest me correct way to recover my vehicle. Since my vehicle runs 1lack kms I recently changed the alternator voltage regulator and new battery. Please provide me solution whether the problem is with the alternator or alternator wiring. Also When the alternator wire plugged out, fuse works and doesn't blown. All the device works normally. Thanks in advance to whomever replied.

5 Replies

MHPAUTOS

MECHANIC
31,937 POSTS

Get the alternator removed and tested for internal faults as I feel the problem it here.

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Tuesday, September 15th, 2015 AT 2:44 PM

VIKISAHA

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3 POSTS

Thanks for the reply, I will take the alternator out and check them.

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Wednesday, September 16th, 2015 AT 9:27 PM

MHPAUTOS

MECHANIC
31,937 POSTS

Let me know how you get on, re post if you need further assistance.

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Thursday, September 17th, 2015 AT 12:50 AM

VIKISAHA

MEMBER
3 POSTS

I take out the alternator and I found that the rotar winding touches the alternator body and thus cause short circuit. Then I moved it frm body to original position in winding. Then I reinstall alternator, nw there is no short n fuse blown. But another problem arised that the power comes out from alternator is very high actually amps increased this cause fuse redish hot. So I recheck the alternator and I take it nearer mechanic shop I found the problem with voltage regulator. Mechanic said changing the regulator may solve the problem. But I actually changed before only 6months. Also regulator cost very high here. Pls tell whether should I repair it again or go for new one.

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Saturday, September 19th, 2015 AT 1:00 AM

MHPAUTOS

MECHANIC
31,937 POSTS

If you go for a new alternator, you will not have a problem with charging for years, if the old alternator has been repaired before and now it's up for a new voltage regulator, there is just so many times that you can re build it, if it was mine I would opt for the new alternator.