How do you replace the 100 amp alternator fuse in a 2004 Toyota Corolla

It is a very basic, entry level Toyota Corolla and only sold in South Africa. You didn't tell us the year, but they are all here. Fuses 3,16, 18, and 25.

Fuse Box Diagram Toyota Corolla (E140/E150; 2007-2013)

https://fuse-box.info > toyota > toyota-corolla-e140-e15...

Fuse box diagram (location and assignment of electrical fuses and relays) for Toyota Corolla / Auris (E140/E150; 2007, 2008, 2009, 2010, 2011, 2012, 2013).

Corolla » Fuse Diagram

https://knigaproavto.ru > Fuse Box Diagram > Toyota

Fuse Box Layout Toyota Corolla CE, LE & S 1.8 L - 1ZZ-FE or 2ZZ-GE (2003, 2004, 2005, 2006, 2007, 2008)

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I think that is the main fuse for the alternator, which when blown prevents battery charging.

Well the smoking fuse would mean the circuit between the alternator and battery is overloaded just like in a house.
Either a short to ground or a component drawing too much current.

Hi. The fusible links are the big fuses located in the fuse box. The exact location of the fuses depend on the engine and on the version of the car. In 1997 Toyota built series
7 Corolla. At the end of 1997 Series 8 was introduced. in the year 1997 both models with different engines were distributed. There are up to 4 fusible links (big fuses ranging from 30 Amp towing protector to 100 Amps) See here.
Low amps fusible links are also in passenger compartment.
The fusible links are simply fuses and can get replaced using long nose pliers.

Below I have published the fuse diagrams covering Toyota series 7 (1993 to 1997) models.

The fusible links can be purchased here. The site also includes schematics.

In case the car is a series 8 (late 1997), here service manual for series 8.



Here a fuse link for Corolla 1997, color may vary depending on amps, the one below is low amp current 30A, 100A is usually blue and 40A green, there may be black fuses with no color code:

possibly to much ampereage draw from fuel pump check for codes and sometimes can bang on gas tank and will start after replacing fuse if vehicle starts then have fuel pump replace it will fail again

The 100A fuse appears to be for the alternator. If I'm looking at the circuit you were referring to it appears the 30A fuse is the power fuse for the door locks and power relay, and the 7.5A branch of this circuit is for the diagnostic connector. My guess is that the voltage regulator which is part of the alternator is the culprit. You can have the alternator tested at most auto parts stores but it will have to be removed from the car. Hope this helps.

Please rate my advise.

This will be a standard pull out fuse which is larger than a normal fuse. It will be located under the hood in the fuse block with a cover over it

On the sides of the fuse box, two bolts are holding the fuse down in place. I believe you need a 10mm socket to remove the bolts. Then, the fuse should slide right out.

the fuse link is bolted in from the two side in the fusebox.you have to un bolt the whole fusebox so you can raise it and if you look at the sides there are two side panels that can be moved down so you can get a socket or spanner on the two bolts apprx 10mm. undo them and raise the fuse out and put the new one in and tighten up the bolts again. hope this helps.