Fuse Between Alt n Battery
 

Cant Find a Definite Answer. Some Say Yes, Others Say Dont Bother

If So What Size Fuse For a 140 Amp Alternator?

Its a One Wire. Not Sure How To Wire It. Wire From Alternator To Battery or Can It Be Wired To The Starter Solenoid?

Can The Fuse Box Be Powered From The Starter Solenoid?

Is The Painless 30700 Kit An Idea...

Just Dont Want a Fire.. Thanks Guys
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Re: Fuse Between Alt n Battery
 

I have a 30 amp fuse right after the battery. The only time it ever popped was when my voltage regulator died. I do have a mostly factory truck, so even with lights, radio, and HVAC running, I should be around 30 amps. With the factory setup, the power will pull from the generator instead of the battery, since the generator is located between the battery and the fuse block. The only thing going to the battery should be for charging the battery.

I have considered putting a big fuse right after the alternator. Some food for thought. Say your alternator wire hits the header and burns through. The fuse on the battery should pop right away. Once you shut the engine down, the alternator is no longer supplying power.

This does also depend on exactly how you have it wired. If you have the alt on the passenger's side, wired to the starter, then I would be much more inclined to have a fuse. I believe OEMs use a fuseable link between the alternator and battery. I'm pretty sure that's how it is on my 97 Suburban with a 140 amp alternator.

Re: Fuse Between Alt n Battery
 

What you should install is a fusable link not a fuse. The OE's don't use fuses. They will protect you from short circuits but won't arbitrarily fail (as will fuses do) and cause damage to the alternator. Here is a link to my repair thread look to post 469 for more information on fusable links.

http://67-72chevytrucks.com/vboard/s...698377&page=19

This link will help you on how to correctly wire your new alternator. Plus tons of other good information.

http://www.madelectrical.com/electri...evymain1.shtml

Hope this helps.

Re: Fuse Between Alt n Battery
 

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FWIW, I'm going with a fusible link to protect mine. Alt goes to bus bar via 6ga cable. I'm going to install about 6 inches of 8ga fusible link wire between the alt and the bus bar.

Hth,

-klb