5.3 alternator
Joined: Sep 2004
Posts: 3,148
Likes: 12
From: Downers Grove, IL
Theres a link in the FAQ sticky, and it depends on the year but...
99-00 Terminal B needs to be connected to IGN power through a resistance source (can be a resistor or light bulb). Wire terminal B to one side of a 470 ohm 1/2 watt resistor and wire the other side to a wire that is hot(+12v) when the ignition switch is in the run position. Or use a light bulb (usually a 194) instead of the resistor. If you use a light bulb it will act like the generator light in a older car.
01-?? See above for terminal B, and these also require a second wire. Hook terminal C to a +12V IGN source (ie the same wire you used for termial B, but terminal C needs to be hooked directly to it, don`t put a resistor or light in line.
On some 2003 and newer 5.3L`s I heard that they have started using 3 wires, but I can`t remember what the 3rd one is for or how to hook it up.
99-00 Terminal B needs to be connected to IGN power through a resistance source (can be a resistor or light bulb). Wire terminal B to one side of a 470 ohm 1/2 watt resistor and wire the other side to a wire that is hot(+12v) when the ignition switch is in the run position. Or use a light bulb (usually a 194) instead of the resistor. If you use a light bulb it will act like the generator light in a older car.
01-?? See above for terminal B, and these also require a second wire. Hook terminal C to a +12V IGN source (ie the same wire you used for termial B, but terminal C needs to be hooked directly to it, don`t put a resistor or light in line.
On some 2003 and newer 5.3L`s I heard that they have started using 3 wires, but I can`t remember what the 3rd one is for or how to hook it up.
Teching In
Joined: May 2005
Posts: 36
Likes: 0
haven't used that high a resistor. give it a try, it won't hurt anything, just won't work.
the resistance does two things in this circut.
1,it turnes on the regulator to charge.
2 , when the key is on, but engine not spinning, regulator inside alt. grounds out. if resistor is not in circut, you will burn up regulator,. questions give me a call, steve 909 910 3867
the resistance does two things in this circut.
1,it turnes on the regulator to charge.
2 , when the key is on, but engine not spinning, regulator inside alt. grounds out. if resistor is not in circut, you will burn up regulator,. questions give me a call, steve 909 910 3867
Joined: Sep 2004
Posts: 3,148
Likes: 12
From: Downers Grove, IL
I know that a 500 ohm resistor will work, but I don`t know if a 5w resistor would work. I don`t know what difference the watt rating of a resistor makes. The 470 ohm resistors are readily available at radioshack. Theres a link in post 31 https://ls1tech.com/forums/showthrea...ght=alternator
Joined: Nov 2001
Posts: 1,707
Likes: 33
From: Anderson, Indiana
A 500 ohm, 5 watt resistor will work fine, it's just WAY more wattage than needed. Anything in the 470 - 680 ohm range, 1/2 - 1 watt is all that's needed. A 5 watt is just overkill and is a more expensive resistor, but if you have one laying around it will work perfectly.
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91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
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I kow this is an old thread but I have a q related to this. I have an 04, 5.3 going in a 65 Vette. I've tried to keep as much of the modern features as possible. In this case I'm using the battery control module. The alternator wiring connects to this module. I'm taking a leap here by assuming I won't need a resestor in my wiring? Any input?
Bob
Bob
