Can you rewire alternator to battery?

[jrpmp69]

My friend has a bad connection from his alternator to his battery on a 96 GST, can he just run a new wire from the alternator to the battery?

 

[DROOPY209]

I have a soundsystem in my car pulling about 160A.

I got rid of the stock wire from alternator+ to the 80A alternator fuse, and from the other side of the alternator fuse to the battery +. I replaced it with 4ga power cable, the kind you use for car audio amplifiers. one section of 4ga wire from the alternator+ to the fuse, and another 4ga section from the other side of the fuse to the battery +.

Worked great for me.

 

[jrpmp69]

Kool, so i guess we'll do that then.

Thanks tocayo.

 

[DROOPY209]

No problem Tocayo.....anytime..

here are some pics of what mine looks like on my red car.

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[1stGenRocks]

whats the point of that if your still using the 80a fuse? the fuse will blow before the stock wiring melts so if you arent blowing the fuse you would have been fine on the stock wires

 

[92awddsm]

whats the point of that if your still using the 80a fuse? the fuse will blow before the stock wiring melts so if you arent blowing the fuse you would have been fine on the stock wires

The heavier wire carries more voltage at the same amp draw. You tell me what is better, 14gauge wire carrying 11volts at 75 amps or a 4gauge wire carrying 14 volts at 75 amps?

 

[1stGenRocks]

good point i never claimed to be an electrician

 

[dnhieu]

The heavier wire carries more voltage at the same amp draw. You tell me what is better, 14gauge wire carrying 11volts at 75 amps or a 4gauge wire carrying 14 volts at 75 amps?

i learned that at skool today ....

 

[DROOPY209]

whats the point of that if your still using the 80a fuse? the fuse will blow before the stock wiring melts so if you arent blowing the fuse you would have been fine on the stock wires

More current. Have you seen how tiny the stock power wire is from the alternator to the battery? That shyt can't handle 80A. That wire will eventually melt, and I've seen it happen. It's happen to a couple people that I know, including a couple 3Si's. My speaker wire is the same gauge as that stock power wire.

I'm gunna replace that red 4ga power wire with 0ga power wire, and run a seperate 4ga power wire from the alternator+ to the battery+, with a 100A fuse in between. I'm also gunna relocate the battery behind the backseat. That will keep my Zapco amplifiers happy.

A 180A alternator is also in the works. Either that or add another alternator where the A/C compressor is at.

The thicker the power wire, the easier the voltage and amps can run through it, plain and simple.

.....kind of how your stock fuel line is so restrictive, when you upgrade the fuel line from your fuel filter to the fuel rail, the fuel travels much easier.

 

[90 GSX]

\The thicker the power wire, the easier the voltage and amps can run through it, plain and simple. QUOTE]


It's called resistance. Voltage = Current * Resistance

 

[jrpmp69]

Someone at Autozone told us that we had to cut the harness open and find where the wire was bad and fix it there because the alternator doesnt just go directly to the 100amp fuse (2g) they said it has wires going to other places in the harness, is this true? or does it go directly to the fuse?

P.S. Both the alternator and optima battery are new and the battery keeps dying.

 

[steve]

Someone at Autozone told us that we had to cut the harness open and find where the wire was bad and fix it there because the alternator doesnt just go directly to the 100amp fuse (2g) they said it has wires going to other places in the harness, is this true?

The only place that wire goes is from the alternator to the alternator fuse.

 

[jrpmp69]

The only place that wire goes is from the alternator to the alternator fuse.

Theres two wires on the alternator, Do both wires go to the fuse?

 

[steve]

Some cars have 2 wires rather than 1 to carry the higher current. The 2 wires are in parallel between the alternator and fuse. You can see this in the FSM electrical section for your car.

Steve

 

[jrpmp69]

Thanks guys for your help. We ended up running a 4 gauge wire from the alternator to the fuse and keeping the stock wire that goes from the fuse to the battery and worked just fine, the battery hasn't died since and car is running fine.