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Those that have done the alt. rewire...

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04GPCOMPG

New member
What have you done with the existing alt wire? where does it go to? Is the wire from the battery to the relay box still needed?
 


I left it attached as well. There's no reason to remove it. Electricity takes the path of least resistance which will be your new wire. You've actually got more current handling capacity with both wires than just one.
 


"Note: We recommend leaving all original alternator and fuse box wiring attached." -Easyperformance.com

I've noticed most people just add the second wire.... that is what I will be doing when I get it.
 
I had posted this earlier in another thread about discussion on the alt rewire/OEM wire.... It applies to this situation too:

Have you ever measured the volts?
1. OEM Wire only
2. OEM wire AND Rewire
3. Rewire only

I think the results of those tests will give you a better perspective on what is more helpful. (only flaw I see is that each car is different on volts, but it will still be an overall good test)

Synthetic also said it would be good to measure the volts of each wire too while they are both connected.

I don't have the rewire or voltage booster yet, so I can't do the test.... but it would be interesting to see the results if anyone measures it!
 
I've got a scan gauge now, and it wouldn't be hard to do this for me (since I can see the volts digitally). I may undertake this tomorrow.

A better test would be a multimeter, and measure the resistance from the alternator positive post to the posts at the fuse box.
 


Let us know what you find. Though the full effect, I suspect, will not be seen at normal idle voltages. The resistance becomes magnified with current levels. That is to say that the more current that is demanded of the alternator, the more that resistance in that wire becomes significant and impactive.
 
I didn't do it today. Too much running to do. And, the more I thought about it, I'm not going to see a difference with the scan gauge since the alternator compensates for it. Like Synth said it needs to be under heavy load and the most load I can put on it would be to turn on my fans and rear defroster. I don't have a high power audio system.

I really need a multimeter.
 
now I've seen this done on a 99-03 but i dont seem to see how to do it on an 04+ can anyone post a pic for me?
 
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