120amp fuse mean I have a 117amp alternator?
#1
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Sorry for the quick question without a search. I only have 2 min in front of the computer.
I checked my fuse box and it has a 120amp fuse for the alternator. Does that mean the alternator that I need to buy has to be a 117amp? Or is it as easy as bying a 140amp fuse and getting a 136amp alternator?
I checked my fuse box and it has a 120amp fuse for the alternator. Does that mean the alternator that I need to buy has to be a 117amp? Or is it as easy as bying a 140amp fuse and getting a 136amp alternator?
#4
#5
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Mine was a direct replacement. From what I understand, the wiring didn't change between the different alternator choices. I'm leaving my 120A fuse in until I find a reason that I need to upgrade it to the 140A. Maybe someone else knows differently about the wiring, but I doubt they would use a completely different wiring harness because of the alternator.
#6
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#8
#9
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The voltage regulator regulates the output of the alternator based on the load (ie. stereo, Off-Road lights, winch, etc). So if you have your truck all decked out with a big stereo, a higher output alternator is needed to keep up with charging the battery and running the equipment.
#10
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The only way you are going to blow the 120A fuse is if you are running a ton of aftermarket lights or big stereo equipment. I have none of that now, so I don't have to worry about blowing the fuse. When I do add aftermarket off road lights and the such I will put in the higher fuse. Just get the 136A, it's always nice to have the extra capacity for the future and it will not cause you any problems.