Re: Alternator help needed

[farna@xxxxxxx]

Thanks for that corretion Matt, I'm sure it will save someone! I knew it was one of the wires...


On May 20, 2005 Matt Haas wrote:

> This is wrong. If you attach the field wire directly to 12 volts, the magic
> smoke escapes from the electronics. Once that happens, the alternator is dead.
> 
> The field wire needs to have some resistance in it to keep this from
> happening. In a car with a warning light, the light bulb takes care of the
> resistance. If you don't have a warning light (you need a voltage gauge in
> this case), you need a resistor in the circuit. If you don't hook that wire
> up to anything, the alternator will not charge.
> 
> The other wire is a voltage sense wire. That wire can be hooked to the
> battery charge terminal but a better place would be either to the battery
> post, the battery cable where it attaches to the solenoid, or (if your car
> has one), a power distribution block. If you leave this wire disconnected,
> the alternator will produce max amperage and will burn out in short order.
> If you're really lucky, this could also set your wiring harness on fire.
> 
> If you want a real one wire alternator, you need to get one that has
> self-exciting guts. I think the difference is just in the electronics but
> there are a lot of real one-wire Delco 10si style alternators on the
> market. PowerMaster (I have one of these) makes them that work both ways
> for more flexibility.
> 
> Matt
> 
> At 10:44 AM 5/19/2005 -0400, you wrote:
> >An alternator has to have some battery voltage going to it to excite the
> >field before it will charge. A standard Delco alternator can be made into
> >a one-wire by simply attaching the field wire to the battery cable stud on
> >the back of the alternator. The other wire in the two prong connector is
> >for the alternator light on the dash.
> >
> >You're going to have to study the original Motorola wiring diagram and one
> >for the Motorcraft external regualtor. You may have to move some wires
> >around and/or leave some disconnected. Some of the wires aren't used when
> >you switch from a generator to an alternator.
> <snip>
> 
> mhaas@xxxxxxx
> Cincinnati, OH
> http://www.mattsoldcars.com
> 1967 Rambler American wagon
> 1968 Rambler American sedan
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> 
> 
> 
> 
> .


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