Alternator Died. Why?

[SkyHighColorado]

The 105amp is just weak, they struggle to handle the load of the headlights and blower motor. They come with a warranty I have my receipt in the glovebox. I replace mine about every 1.5 battery life cycles, always goes out in winter. If you upgrade to a higher amp just be sure the mounting holes line up.
Check the cable from battery to alternator.

 

[kennythewelder]

The 105amp is just weak, they struggle to handle the load of the headlights and blower motor. They come with a warranty I have my receipt in the glovebox. I replace mine about every 1.5 battery life cycles, always goes out in winter. If you upgrade to a higher amp just be sure the mounting holes line up.
Check the cable from battery to alternator.

A bigger alternator is not a bad idea, but without upgrading the charging wire, your still trying to recharge the battery through a very small wire. The big 3 upgrade, will help a lot with this. Even better, adding 2 extra ground wires ( 1 to the cab, and 1 to the battery, from the alternator case), also helps. I used a #2 welding lead, but @5vortec7 sales a very nice kit. Then the other thing is, at idle the engine doesn't turn the alternator fast enough to make the alternator charge at a higher capacity. I also got an overdrive pulley for my alternator. I went from around 9 volts at idle, with a full load, to 13. And all of this on the 105 amp alternator. Just a FYI

 

[SkyHighColorado]

Lol I haven’t been on here in a long time, just logging in the other day to see if anyone wanted to buy my cateye . I did pretty much all the cool mods back in the day. Was just offering some advice. For me the 105 sucks, but I don’t mind new freebie every other year ‍ I’m bored at work, so here’s some picks of my filthy truck @ 355271 miles