Big 3 with computer?

This might be long, so i'll try to organize it so it's easily read.

VEHICLE:

PROBLEM:

According to the few posts I can find on the Big three they basically are something like this:

I've read various things saying just upgrade the wires to the fuse box if it goes through there - or run an external fuse to the battery - something on the order of 200 to 300 amps (I'd personally start small)

I've done all the other wires, but curiously enough, the alternator wire seems to go to the car's computer... leaving me fairly dumbfounded as to whether I should go ahead and run a wire directly to the battery or not. 

any ideas?

you must be tracking one of the field wires for the alt.

the one you need  will have a ring terminal on the end of it and goes to the back of the alt. it stands alone only one wire about 10 - 8 gauge in thickness.

Well I just finished tracking the wire before I saw your reply. I tracked the right wire - the only thing bigger than like 18/20g wire. Unfortunately I've lost it somewhere in the loom.

The PT is packed in really tight - and I'm having a grand old time trying to find where it's going to. I assume it MUST go to the fuse box, but I can only see one mass of wires going in and out of the fusebox and none of the wireloom paths lead to the alternator!

I'm going to call it a night tonight and enjoy the newyears celebrations here with my family - and hit it up again tomorrow.

I hate to tear up the stock wire coverings - so i'm going to try to trace it otherwise.

OTHERWISE:

would there be any other issues with adding a fused 4g line to the alternator (additional one) even if I don't know exactly where the stock alternator to battery wire is run?

leave the factory wiring in place do not desturb it. follow the direction and just add another wire from the alt. to the battery. depending on the current draw of your amp and whole system use proper guage wire. 4 guage or thicker.

one thing though you said the wire you were chasing was 18 - 20 gauge that is a very small wire and is most definety the wrong one. like i said previously it should be some where in the size of 10 - 8 gauge.

Sorry - I think you miss-read. I said I was tracking the right wire - the only wire that wasn't 18 to 20 gauge.  It's a single wire that appears to be about 8 gauge. 

Unfortunately when i looked where i thought the wire was going - into the computer - it was actually a bundle of smaller wires. So Somewhere in the loom I lost the wire i was tracking.

I just wanted to verify that there was no ill effects to adding that extra wire. no side note like... "it works except in a few cars with some strange wiring..." I was just curious because all the other cars I checked (f-150, Scion xB, Jeep Liberty) they all seem to be pretty straight forward from the alternator to the fuse box - the F-150 conveniently has a stock 4g wire running to the alternator.

anywho - thanks for the advice.